"Sex means nothing inkels. Sure, we can get sex with any loser, but we want love and a nice guy (Chad, of course)." Basically they think they're femcels cause they can't have a Chad to settle for them. They want "love", meaning they want their vaginas to tingle from looking at Chad and being fucked by him. Although Chad would probably still stick his dick in them on a dry night, he won't settle down, and they hate that so they think they're femcels.
Have you ever heard women talk about a "spark", or that the "magic" isn't there anymore or that she just doesn't "love" him anymore? It's the same principle at play here. She just wants a relationship with a bigger Chad than she can get.
Meanwhile an incel can't get his looksmatch even if he installed all the dating apps in the world, went out trying to score every night, and did all kinds of maxxing, social circle maxxing, money maxxing etc...