It's also very obvious because the supplementary media does have LGBT characters. Doctor Aphra is gay and the current arc of her comic has set up a potential female love interest for her, and one of the main characters in the Aftermath series of novels is a gay man. Disney/Lucasfilm is fine with that **** until you try to put it in their most visible mainstream medium, film, in which case it's a no-no. Applies to the MCU as well. You'll see LGBT characters in the comics and live-action shows, but we now have at least two confirmed instances of scenes with explicit LGBT confirmation being cut.
Same thing with Marrow. She was butt ugly for most of her existence and then when she reformed and joined the X-Men, they came up with some bullshit plot where she got injured and then a healing device screwed up and accidentally rewrote her genes so she would be beautiful.
A lot of dudes can't handle the idea of a female protagonist who isn't crazy hot.