Dunno about 50%, but a lot of men are "locked out" of dating by simply not having contact with women their age.
For example, I'm 29, got the full 666 (and as far as I can tell, am not ugly, lol). I meet zero women through work, the women I meet through hobbies (martial arts, dirt biking, lifting) are generally either much older than me or teenagers, and the five or so women my age I meet through an average year are generally fugly landwhales who try to lose weight for a month or so before deciding they'd much rather stay fat.
Tried online dating, too, but ended up shadowbanned on multiple sites - basically, once I realized that I wasn't getting any replies (neither positive nor negative) I created fake female profiles and tried to message them from my real profile, and no matter which site, it'd always tell me the message had been sent, while the other profile would not receive it. One site then instead created a "match" with some premium-membership single mom of 40+ years whose profile I'd never even seen before, and that was the point where I decided to delete all my accounts.
By now, I'm torn between accepting KHV status or trying speed dating. But I'd expect that with speeddating events, it's going to be even more ugly fatsos.
inb4 highschool was your chance
Had a number of girls approaching me back then, but one of them was a full-on lunatic who ended up threatening and in some cases, attacking other girls for even talking to me. Yanderes aren't as nice IRL, sadly.