LGBT people are something like 10-20% of the population.
It appears to be 5.5% of the population.
The reason studios put LGBT content in movies and games is that a lot of people in the real world, aka their customers, are LGBT.
If their population were small, disproportionate representation can still have a positive impact for awareness. That being said, I think a big reason for the representation is the percentage of people in the arts that is LGBT is greater than the general population. It would be tough making content and looking in the eyes of so many creatives while not including characters like them in stories.
Side note:
Maybe it’s not too realistic to have a bunch of out queer characters in a drama set in Elizabethan England.
All the recent period pieces I’ve seen have LGBT characters. I’m going to use this as a moment to advertise My Lady Jane. It’s not an entirely accurate depiction of the story of Lady Jane Grey (for obvious reasons), but it was an entertaining show.
Not just “see her as.” I’ve never heard of a transwoman giving birth. I’m a huge fan of niche edge cases though and I’ve heard of one accidental finding of an XY, assigned female at birth person giving natural birth. This case was mentioned in research that was studying a family that had women that were experiencing hirsutism.