LGBT in movies/games

i just read an article claiming that its bad that the MCU doesn't have any LGBT characters. why is this even a problem? the movies aren't about each characters sexuality so can we stop shoehorning it into our movies and video games for no reason?

dont get me wrong i'm supportive of the LGBT community but if it has nothing to do with the plot/story being told then i dont care if one character is gay. its not important.