I agree with everything you wrote, but I'd like to emphasize a minor point.

MBAs, Lawyers, etc, all have a bad image because, as you point out, they are chiefly a community of - make big bucks/whatever is legal is ethical - people.

And while it is unquestionable that a lot of people do NOT belong to that group, a majority do.

Therefore the public's perception is accurate.

Sad, especially unfortunate for the good lawyers and MBAs, but true.