I think it was slightly different than mental health.. that wasn't really a "thing" when he was with the Red Sox. More like leadership, culture, growth, focus, etc.
Definitely important stuff but no he wasn't coaching pitching or being a therapist.
That could be an asset to the coaching staff but idk if it's worth the pitching coach spot on staff. But he did it for their short season A ball team.
Not the guy I would hire but I don't know a ton about his coaching philosophy and what he believes in terms of sports science, data, etc. because there's not much of that going on at the D2 level anyway and it wasn't popular in the MLB when he was there. He would have to be venturing in that on his own and I doubt that's the case. So hiring him completely defies everything JD said in his presser - which would also not surprise me the least bit.