Yes, the old "hebephilia is not pedophilia, and is normal" shtick.

Obviously yes, there is a very big (biological) difference between sexual attraction to pubescent vs pre-pubescent persons.

That has nothing to do with the Age of Consent, which is a legal standard set in order to account for social dynamics (power dynamics, education differences, etc) that also factor into consent, which is most of the situations he's talking about, e.g. Roy Moore.

If Stallman wants to do the whole, "there's no difference between being attracted to a 17-and-364-days year-old and an 18 year-old" bit, I don't think anyone would care outside of the fact that being hung up on that when you're not yourself in that dating range just makes you seem creepy. When you're 18, that discussion is much more relevant. Not so much at Stallman's age.

But him clearly talking more about the 13-14 year old range, where even someone going through puberty is much closer to pre-pubescent than post-pubescent, just makes him seem like he's actually a pedophile who wants a loophole.