Probably because most normal people wouldn't want mentally unstable chicks that probably have high chances of cucking you in the future, or mentally and physically abuse you.
Everyone spouting they want spice in their lives and want those mentally unstable women are loud and noisy until they actually got in a relationship with one.
Plus Jill still being a virgin up until this point just proves she actually learned to respect herself and doesn't spread her legs to any dude she thinks funny and know what she wants.
Smart, pretty, and not a loose chick. And she plays the piano.