You're also making the assumption that if you're fine with it then so must everyone else. If we're to do all this assuming, then let's assume on the side of people's privacy.
Your statement reads, to me admittedly, that since you put your public info out there that no one should care if someone else outs their info to the public. In context of the discussion.
But you can't dox yourself, in the usual meaning of the term.
The point I'm trying to make is that 'ease of discovery' is indeed a relevant factor here, and furthermore in this specific case the user was citing his professional experience with a username that corresponds to his own.
I'd be willing to bet he's perfectly alright with someone posting his professional credentials on this site. I know I would be (and have, in fact).
So is it really doxxing at all, then?
This isn't a topic I'm all that passionate about, I just wanted to point out the differing opinion.