It's why they want women to be stripped of all rights. The men who believe that women should stay stupid, ignorant, second-class citizens barred from the public sphere of society, believe so because the prospect of women knowing they don't have to settle threatens them immensely.
Women are the ultimate gatekeepers. The more women there are who realize that they don't have to settle for an abusive deadbeat, the more low-quality men there are who would be unable to find wives, and who would be unable to continue their "genetic legacy." But instead of trying to improve themselves, these incels either whine about "western women being masculinized feminazis", or troon out trying to poorly imitate women and then continue dictating to others what a "real woman" is.
They hate women who know they have worth as human beings, because these women can spot a shit man from just one glance. That's why shit men love young girls with low self-esteem. Even (or perhaps especially) rich men can be shit men, which is why they love "sex tourism" (aka going abroad to buy underage girls forced into prostitution).