The entire concept of debating this is dumb.

Age of sexual majority (AoSM) is a wildly sliding scale that has, through history, been as extreme as "if you're not married-and-pregnant by 14, you need to pay special surtaxes simply for existing while single, you old hag" (colonial-era Canada), to "pious people are completely celibate regardless of age, the older the virgin the better" (many theocracies).

While it currently is on the older edge of the swinging pendulum, AoSM is a swinging pendulum, that generally adjusts itself as per the needs of the population. That is, the greater the threat to the population as a whole, the lower it will wind up being. Japan still endorses the "Christmas Cake" stereotype ("women, like Christmas Cake, are no good after the 25th"), because their population curve is horrific from a sustainability standpoint. The USA, which favors de-population and importing people instead, instead pushes for higher and higher AoSM numbers and social trends to wait 'til 30 to date or mate and instead work on your career or whatnot.

When the needs of the elite shift, the zeitgeist will shift, one way or the other, whichever they require. Some twitterd's hot take that adult women should be legally children isn't going to change that, but the lot of them should move to Australia if such a viewpoint is their preference, since they've made court decisions in the past claiming adult women with small breasts are legally children, so they might get some headway with their efforts there. More loonies are always welcome on the prison island.