A theory for simps is that men are naturally altruistic and optimist, because we still believe in the meme that girls are innocent and can be loyal, loving, caring, wives. Combined with the fact that the media feeds us lies, so after a while we are inclined to believing that "being nice" is what will get us what we want, a wife.
Some men may realize that simpin' ain't pimpin', but still may not want to accept the true nature of females and delude themselves with copes and cope ways of thinking. Also due to the fact that shit in the water fucking plummets our T-levels if you're a Westerner.