Well, but that clears up for that cohort of guys, doesn't it? They get older (and hopefully get their act somewhat more together), and then the younger women are interested in them.
Yes, exactly - it's just an explanation for why it seems like there is a big pool of not-yet-married men chasing a small pool of not-yet-married women on dating apps. It's literally what's happening: as long as older men prefer to date women younger than themselves, and younger women prefer to date men a bit older than themselves, and there is a hard divide between the college and post-college dating worlds, single men will outnumber single women, and the dating app experience will be vastly different between genders.