I see your point, but Cruise puts himself out there in the media spotlight. He actively promotes Scientology as the "answer" to all kinds of things. He, himself, has linked himself firmly into what is widely accepted to be a cult. See my post (far) above for references.
So to reflect on his behavior is, to me, analogous to discussing any other news topic, e.g. politics, sports, that's in the public discourse.
Dr. Drew implied that Cruise has issues. He implied that a diagnosis may exist, but he was not diagnosing him. He did not say, "Cruise is bipolar" or "Cruise has thisorthat personality disorder." He did mention that Cruise suffered abuse, which, as the piece says, is fairly common knowledge. He does speculate on what effect that abuse could have on a person, e.g. Cruise.
So, sure, he may have barely crossed a line, but the lawyer's response made me laugh with its bluster and hyperbole. Like a commenter said, any time you throw the Hitler bomb in there, you've lost credibility.
My 2 cents.
Sometimes you win, sometimes you lose, sometimes it rains.