No particularly special Bitcoin knowledge is required to figure out why, just careful study of that post with a critical and analytical mind (and not the mind of a "fan"). I wasted far too much of my life dealing with people Peter Todd had deliberately confused back in those years - it's a Sisyphean task that simply never ends if you let it - so I don't wish to write out a long rebuttal now, especially as I don't know you. But see if you can figure it out. Like I said, you don't need me to explain if you study things carefully.
As I said to Peter Todd in that thread, I'm a neutral observer and a fan of both of yours. Having been a programmer for over a decade, it's a shame that even someone like me can get so lost in the rhetoric of this debate.
Thanks for all your blog posts, I point people to them all the time. My greatest wish (something I tried to communicate to Peter Todd) is that Core would write some thoughtful, clear, well-argued posts like yours.
But I suppose it doesn't matter, because as we both agree, the experiment has already failed.
This is why I agree with Mike Hearn that the "Bitcoin experiment has failed"[0]. In fact it already did so in late 2015.
He makes technical arguments there which you could debate (some of his technical arguments have been shown to be misleading[1]).
But I think where he hits the nail on the head is that Bitcoin is now simply a circus. Unless the community can be united again, it won't last.
The Reddit censorship, DoS attacks, "scaling" conferences where solutions are not allowed to be proposed. It's childish, and almost shocking that people have stood behind their ridiculous behavior for so long, when they are on the verge of changing the world economy.
[0] https://blog.plan99.net/the-resolution-of-the-bitcoin-experi...
[1] https://news.ycombinator.com/item?id=14833567