"FA" women (and women in general), like most humans, are capable of feeling lonely, and feeling sad about this. However, "FA" women are different than their male counterparts. "FA" women are simply picky and alone because they cannot get the guy they want (such as Chad). However, despite being unattractive, fat, having mental issues such as BPD or autism etc., they could easily get a relationship with lower tier men. They can get sex insanely easy, including these alpha men they pine after; they become depressed when they cannot lock him down after being pumped and dumped. And this is all in spite of being low SMV and other issues. Why do you think the cliche of "lower your standards" is exclusively given to men? They also don't experience rejection often, as they typically are asked out rather than doing the asking themselves. Many of these women have had relationship experience and are not virgins. They also are friendless less often, and could have beta orbiters if they're nerdy enough and project loneliness.

FA men are different. Many have faced rejection after rejection. They've never even held hands or kissed. They ask out even bottom of the barrel women (in many threads in /r/foreveralone, the minimum standard the guys have is that the girl is alive and that she loves him, that's it). And they still get rejected. In order to even have a chance, they must turn their whole life around (job, exercise, personality change, etc.) and there is still no guarantee they will succeed. Women on the other hand can be absolutely disgusting and still have men pining after them.

EDIT: thanks to /u/disposable-pants for summarizing what I'm trying to say:

"women can only be truly FA if they're a raging bitch to absolutely everyone they meet, and even then people will still hit on her if not more; men can be forever alone just by being average and not sociable."

CMV