That is, inceldom comes from being uneducated about how to act and work around women.
Said knowledge is almost esoteric unless you start dating really young or have sleazy uncles who teach you those things.
Most guys think if they just act like a decent human being, they might get a girl. But in the modern day, there is so much more to it than that. You gotta play the game, like the Queen song says. Incels don't even know there is a game, much less how to play it.
There is also a movement to reduce manliness and make it look evil which makes it worse for these guys. Manliness is what makes a man hot.