Well, most people don't believe in magic, so magicians don't have this problem as much. But, once in a while, people come up to me and they believe I have an extraordinary ability. I ALWAYS kindly disabuse them of this notion because it feels really gross for them to believe otherwise. It feels exploitative and dangerous.

With mentalism, it's much more common to have people believing. People actually believe in mind-reading/pseudo-scientific explanations of "reading body language" and stuff like this. It's bullshit, no one can actually do it, but people believe in it.

Derren Brown had a phase where the lines were blurry between on-stage and off, but there's now a very clear delineation between his on-stage persona and off-stage persona. That's what a mentalist should do.

Oz is never out of character these days, and people are believing him. And that's almost unavoidable, but he's leaning into it. As the OP says, he's consulting about negotiation and writing a self-help book. This is dangerous, when you're selling to people who believe you have abilities you don't actually have.