Gentleman/men - yes, it’s also included in the examples. Basically, the gist of it is to use gender-neutral terms whenever practical/possible. Interestingly…”guy” is considered an acceptable gender-neutral term.
Actor/actress (and all of the associated “-ess” words don’t really bother me. I just say actor, because a performer’s gender identity or biological sex doesn’t pertain to the conversation I’m having, so there’s no need to distinguish it.
I’ve always found it far, far more confusing that we have words like actress and hostess or waitress, but we don’t say doctoress or teacheress or cashieress.
Language changes, it always is and always will.