When speakers substitute the word “flight attendant” for “stewardess” or “steward,” they are using language that is?

When speakers substitute the word “flight attendant” for “stewardess” or “steward,” they are using language that is non-sexist.
They are using a gender-neutral term that is politically correct, instead of using a word that clearly denotes the gender of that person. This is a practice that is especially growing nowadays, when more and more people are realizing that the fluidity of genders exists.