The passive approach the incel takes to every kind of relationship (he doesn’t even send Facebook requests out of fear of appearing needy) is the very thing depriving him of opportunities. Now that he thinks about it, if his best friend didn’t text him randomly, he would probably never hang out with someone one-on-one with no particular goal in sight; the idea of casually “hitting someone up” like that never occurrs to him.
Statistically speaking, the incel probably runs into at least three or four girls that would greatly benefit from having him in their life, if not for the fact that neither he or she take that leap of faith, perhaps out of the belief that the other person will pick up the slack. Assuming that is true, achieving a meaningful relationship is just a matter of really good discernment (or repeated indiscriminate shooting, of course, but that was never an option from Day 1).
The incel is a little better at inviting friends to hang out, but he’s still a ways away from imposing himself on another human being in a romantic way. The pathology in his mind is that he can never be 100% certain that someone is into him, so there’s always the chance he inconveniences someone else with feelings they didn’t expect or want to deal with. That, in turn, can taint his image and automatically ruin his prospects with everyone in that specific social setting, playing out like a demented game of Minesweeper. Therefore, he has one shot per location (work, school) to get things right, and he is never quite satisfied with the crush of the week enough to risk this loss, so he just ignores his feelings until they subside, which they do soon enough and without fail unsurprisingly.
His feelings aren’t worth jack, apparently, or in nicer terms, his heart is too sensitive and keeps coming up with false positives. Then again, he will never be satisfied with potentially missing out on great connections, so he is miserable either way.