If those less attractive men are interacting with you only on the condition that you might someday offer sex, then their interest isn't platonic, and never was.

Yes. Men’s interest in women is almost never platonic. The relationship between non-related, heterosexual, single, similarly aged (by a very wide margin) men and women is inherently sexual at least from men’s viewpoint. I think women intuitively and instinctively know this too. Men inherently seek sexual validation, to be recognized as sexual beings by women. Similar to how women want to be recognized as full persons, not be just sexually objectified by men.

Expecting men to want platonic relationships is stupid, naive and frequently self-centered. It’s similar to men expecting women to be content with only having sex and never having a serious relationship.

Then proceeding to complain that if those women want to be more than just used for sex, they were never interested in those men sexually in the first place.

True platonic friendship is known by a mutual lack of sexual interest, either in terms of sexual acceptance or rejection. I’ve never rejected my male platonic friends for sex, because it isn’t even a thought or possibility in the first place. The idea of it is a matter of mutual disgust and is never seriously considered.

The so-called platonic male-female friendships some women claim to have are marked by sexual rejection of the men they seek to befriend. They project the non-sexual feelings they have onto those men, but they are almost always wrong. These relationships are pseudo-platonic.

I would think women too know the this difference between truly platonic and pseudo-platonic from the difference between their female and male relationships. However, women frequently view their male friends as their girlfriends (which is btw inherently disrespectful, condescending and hurtful to a man), and seem to have a more sexualized view of their female friendships too.