Wei WuXian is a great weird gay uncle, he's so simultaneously encouraging and embarrassing! Like a hot Uncle Iroh!

I think it has more to do with the fact that there are so few women overall; many characters do have moms who appear in backstory but there just aren't that many women around in the present day to replace them. I can think of maybe one woman who actually survives to the end of the story. She's fine and happy though!