Potentially. You're mixing "fitness" with "intelligence" -- there's no guarantee that "intelligence" will guarantee fitness.

That depends on whether or not you value passing on your genetics.

Are you implying homosexuals et al are somehow inherently dumber?

No, I'm responding to a comment.

And other people are judging your comment as dumb and somewhat misunderstanding of genetics/fitness.

And I'm judging them in turn for not understanding intelligence or genetics or fitness and for being passive/aggressive.

Right, and you seemed to imply that smartness can be measured in how many live copies of one's genes one manages to produce.

Sort of. The idea that we're somehow smarter today is nonsense on stilts.

Smartest was 10-15 years ago. Flynn effect reversed.

we are not smarter, but we have access to more knowledge

I wonder about that. How much of the knowledge we're exposed to is actually true?

“So you hate waffles?”

https://knowyourmeme.com/memes/no-bitch-dats-a-whole-new-x-w...

If you fail to achieve goals, you're not smarter.

But passing on genes is a pretty arbitrary goal. It's the one encoded in our genes, but (looks around at random object) passing on teacup design is encoded in a teacup. The most teacups are the ones that make people look at them and say "I want a copy of that cup". It's just statistics, not the ultimate meaning of the universe. The humans who think it's the ultimate meaning of the universe may be more likely to replicate - but that's a genetically inherited delusion, not a fact. You can pass on your editor choice just as well as you can pass on your genes.

Is intelligence correlated with having kids?

What does the individual get out of passing on their genetics?

Natural selection does not care one bit about the individual, to the question is completely meaningless. Add to that, that we share 99.9% of our DNA, so you passing it on, means I'm passing it on for free, while you sit there with all the cost. Who's the fool now?! ;)