I'm confused

So apparently it's an ongoing thing that people are upset when "straight" actors or actresses portray LGBTQ characters.

Does that mean LGBTQ actors and actresses ought not portray straight characters?  Does it mean I should no longer see an African American playing Richard III in Shakespeare since Richard III was white?  I used to think acting meant you portray something that isn't really you.

I know.  That was from the Age of Reality, when life and values were based on at least a somewhat realistic appraisal of the way things are.