How come most tall women are single?

I’m not saying all of them are but my best friend says she has a hard time dating. Most of her past boyfriends were her height and shorter than her. She is 5’10 and a large, big girl. She hates it and she bumps her head on things (which I don’t have to worry about no offense) and prefers tall guys. I told her to not limit herself to only 6ft or taller guys. Tall guys hit on me (5’2”) and our other friend (4’11”). She gets jealous of that but there’s guys that love tall women. My best friend HATES taking photos because she says herself that she looks intimidating, a giant and huge. She isn’t that huge. She’s just a big girl. She should consider herself lucky. I wish I was intimidating and tall. She’s been single for years and hasn’t dated in 7 years. She said tall men never approach her or she gets rejected by guys. I told her she will find someone but she doesn’t believe it.