All of this I’ve covered in this thread except the last point.
I don’t have any problem with women competing openly and without scrutiny in men’s athletics competition because I can’t think of any sport where it would confer an advantage. If there were one, I would be against it in that sport. Though safety would still need to be a consideration in any contact sport.
Also worth mentioning, I am not against the idea of getting away from the idea of having sports separated by sex completely, and somehow tiering them by ability. But I think that would be exceedingly difficult to do in a way where it was safe and fair for everyone, especially when it comes to boxing and martial arts. But for other non contact sports, I don’t see any reason to have a division by sex at all, just have tiers from best to worst.