I'm not entirely sure, but I suspect that it really just does boil down to biology—a man who is capable of attracting a foid is 'valuable.' Realistically and logically, this doesn't make any sense when you live in an advanced civilization. There's nothing inherently valuable about a guy who is larger, stronger, or more attractive. If foids actually were attracted to 'value' and natural selection worked, you'd see the most creative and intelligent of us slaying.
Alas, it never ended up being that way, and we never shook the idea that 'attractive' equals 'valuable'—not that I think that 'value' (whatever that may mean) should matter in a man, to begin with.
Still, I would also say that a large aspect of it is the conditioning we go through when we're younger. This idea that 'guys go out and get girlfriends and eventually wives.' That conditioning persists when you grow up, but instead morphs into the idea that we have to 'go out and get laid' in some capacity. That you have to play a part in the theatrics of courting some harlot and taking her to bed.
After all, what else does a teenage boy do? 'Jerking off is for losers,' after all. 'You should be successful enough to attract women every now and then.'
Guys are desperate to not be us. Most guys loathe the idea of being useless and undesirable—and so if they believe that 'I must have sex in order to prove that to myself and others,' they'll do ANYTHING to fulfill that societal expectation. Then, to protect their fragile egos, they'll put other guys down for being less successful than they are (if at all, lmao!).
Of course, in reality, they haven't done anything particularly special or note-worthy—they just spent a lot of money and time for what was likely mediocre sex with a horse-faced skank. But, to put it quite simply, the idea that it was something special is just far too ingrained in their minds to ever think otherwise, and so they'll never come to question it.
It's easier for people like us because we all were involuntarily ripped from that system and had time to dwell on and question it entirely. Even then, there is certainly a good chunk of us that still believe in it for whatever reason—those of us on here who still chase some abritrary standard of 'ascension,' drawing plans on how we'll "improooooooooove" ourselves. It's silly, and I've never hesistated to call it as such whenever I've seen it.
I suppose it's just a cope for some on here, at the end of the day.