Ouch. "Presumably" isn't a logical proposition. Not even close.
I am sure there is wisdom in the different religious heritages. But the religious heritages that lasted were able to do so using a fair amount of practices and beliefs aimed at carrying along commitment to that heritage, as much or more than general wisdom (which has value beyond the religion).
(Not dismissing the value anyone gets from their practices and beliefs, where they don't negatively impact others or treat non-believers dismissively.)
We can all presume, imagine, confabulate. But those are not a good basis for making broad points.
I think you might be assuming that the only interpretation of religious text is that they are all-or-nothing affairs, across the board. One of the core tenets to Christianity is the recognition that everyone is going to sin (or not "adhere to the supposed wisdom of the divine" as you put it) and that they will still be forgiven.
What if it's Whiz?
There are some clues. The Bible has the story of Sodom and Gomorrah, which might be a collective memory of societies becoming gay-friendly and promiscuous then being destroyed somehow. It could have been put into a story about God to make it memorable across generations (we do still have the story after-all, and we don't still have the actual history). In Islam, Mohammed said his greatest fear was that Muslims would turn gay. Why was he so afraid of that? Maybe there was cultural knowledge of what too much tolerance for gayness leads to and we just don't have that knowledge in our recorded history.
Not saying I have the answer, but nobody else does either. It's naïve to just look at the direct consequences and say "they're not hurting anybody so it's fine". There might be destructive emergent social phenomena that come from it being widely accepted over the long term. We only have basically 2 generations of data on gay-friendly western society to observe from.
Sorry , but some people will not follow those outdated rules and also worship a extremely cruel genocidal inhuman God, if my sin will cause you to have to build a boat to save yourself sorry but I don't care.
He's not claiming that your actions are going to cause a biblical flood - that's something you're projecting on to him and, in my opinion, just feels like mockery for the sake of mockery.
He's suggesting that there are generation-spanning lessons that had been learned, both ethical and practical, that made their way into scriptures. Not all the lessons in the Bible (or other religious text) are going to be pertinent to the modern day. To say it contains nothing of value, and that nothing can be learned from, it proves his point exactly.
The fact that religion survived or spread does not prove what you imply it proves, it was an useful tool for the powerful to keep the poor in check like
1 Bible says to pay your taxes
2 Bible says that is OK to be poor because you will be rewarded later
3 Bible says that violence is bad so do not attack your lord and try to make justice on Earth, you will get your justice in the next realm.
And so on, a very good tool to manipulate people.
To use a simple example of what I meant - in the west, the secular section of society has below-replacement fertility. In other words, for whatever reason that group is slowly dying off. I hate to say this as someone who was secular most of my life but I think it's objectively true (do you disagree?)
Meanwhile religious folks live in the same world as we do yet somehow are able to maintain 2.5 to 3.5 fertility rate (this is in the US) depending on which version of the "homicidal inhuman G-d" they believe in.
This suggests to me that somewhere in that "religious" operating system is encoded immunity to things that are slowly killing off the unreligious right now. That's the kind of thing I was talking about in my post - we should be very careful about discarding that.
Except that the secular section is also replenished by children of the religious becoming secular, which currently seems to be outweighing the relative birthrate differences and is causing that secular section to be increasing as a percentage of the population.
I am sure you know of the correlation between affluent people having fewer children and highly educated people tending to be more affluent. I dont think its particularly mysterious or confusing why secular populations have a lower fertility rate. It should be pretty obvious at a glance.
Religion is a lot like conservatism in that it provides a self affirming world view that relies on ethics from centuries past. I am sure there are many highly democratic, rich and ethical conservatives and religious types but generally these traits are indicators of the opposite. There is a reason the past century of progress has allowed such great leaps in education, quality of life etc while being accompanied by an ever decreasing level of religiosity.
And in particular these rules and principles will continue to evolve, where the Bible wont.
What remains proper to the Bible are the funky bits, the outright offensive parts and anachronistic advices.
But the idea is flawed in that if the Bible wrote 3000 years ago about certain virtues and dangers, presumably it is because they had seen what the opposite looks like and thought it was important to codify and pass forward that knowledge in a way that had a shot of being still read thousands of years later.
In other words, our idea to discard the ideas in the Bible is not novel, it is perhaps the same idea that has led to disaster millennia ago that caused the Bible to be what it is to begin with.
It is similar to looking at a "tsunami stone" and saying "why would I heed advice of someone who has never seen a microwave oven when I have modern science."