Ok, middle of the night, need to do an addendum. I prefer specificity as a rule, I agree with The Economist in using he or she instead of the awkward "they" in nearly all cases. However if an individual doesn't fit, then of course there should be flexibility.
Recently, Asia Kate Dillon needed to classify themselves as an Actor as opposed to Actress in order to qualify for an award (incidentally, historically "Actor" is gender nonspecific). But outside of the award competition if they ("they" applies in Dillon's case) would prefer being called a "performer" it would fit, it would make sense, it would be right.
A rule can bend and still be a rule.
Asia Kate Dillon, the remarkable Taylor on "Billions"
I now return you to the discussion of lotions and clean linens.