Reinforcement Learning is full of Manipulative Consultants

Imagine you go to an investment consultant, and you first ask how he charges. Is it according to the profit you'll make? "The more accurate I am in my predictions of your returns, you'll pay me more. But I will be tested only on the investments you choose to make." This smells a bit fishy, and you start sniffing around for other people who are using this consultant. Turns out he recommended them all only government bonds with low return and low variability.