Idk, it’s just kinda closed minded. Every sexuality besides one is included and people hate the idea of adding them. Are strieght people too much of “normies” ?
also because lgbtq+ is everything that isn't normal, in a traditional sense. But they still can be a part of the community, in the sense that there are plenty of straight activists ect. It really isn't close minded, and most straight supporters I have met don't mind.