First, "y'all" is incorrect because "you" is already grammatically plural. "You all" can be used to resolve ambiguity or provide emphasis, as in "You all can go to the movies" (i.e., otherwise the people being addressed might have thought only some of them could go).

We are all well aware that language changes. However, there is a distinction between natural shifts in language over time, which reflect the living and changing nature of language, and politically motivated attempts at artificially changing the language, which smack of Soviet utopianism.

"Cripple" became "handicapped", then "disabled", then "differently abled". The last is a bullshit expression because it means nothing - everyone's abilities are different from those of anyone else.

Likewise, the use of "professional" in this context obliterates any meaning, both of the word itself and the context it is supposed to provide. "Waste management professional" rather than "garbage man" is not only unnecessarily long, but it really doesn't convey what the person does. "Professional" is abused and misused in quite this way, and it's done because certain people feel uncomfortable saying "garbage man" or "secretary" or "stewardess" because they feel that the terms sound derogatory.

It has nothing to do with "honorifics" and everything to do with liberal discomfort. No one is demeaning anyone by saying that they shouldn't call themselves a "professional". Some of the most successful people aren't/weren't (Bill Gates, Steve Jobs, Mark Zuckerberg, Oprah Winfrey, Sam Walton - the list goes on and on and on).

It's just about not warping and contorting the English language.