Some people are godless truth haters. I had a roommate once that didn't believe in conspiracies. I was arguing with him that dark men are trying to rob us, and he wouldn't believe it. He just constantly said "expand your horizons".
Perhaps incels are more inclined towards the truth (I have no evidence of that), and I would suppose the reason being is normies are so focused on embracing worldly pleasure/improving their SMVs/careermaxxxing with the lifeforce sex is providing them that facing the truth, no matter how ugly, would disorient them and force them into philosophy which, not only would make them unattractive to the primal instincts of foids, but would also make them question their moral choices and would brutalize their rose-coloured worldview. The latter is necessary for them to be accepted and belong in normie circles and have easier access to opportunities.
But most importantly, it would make them stop being morons. Some people are addicted to bullshit and hypocrisy and drink both like kool-aid. I don't know, it takes some internal tenacity to face the truth and still operate in society. When women on Youtube ALL post they want men who respect them and say how they hate bad boys, you know there is some kind of social force in people's minds, some kind of collective soul, that wants to keep the status quo by burying the truth and flashing a deceiving message that appeases one's emotions.
This is just what sapiens is, and since our species is still very young (20k years old?), it's still very animalistic, lying and immature.