Does it sound like I am suggesting that? That's certainly not my question. I don't think RFK should be anywhere near anything. But he is. So the only option is to accept that, and hold off judging someone until bad policies are released.
It's entirely possible RFK feels extreme regret for such incident and wishes to help prevent it from happening again. It's also entirely possible RFK will do a decent job, just like it's possible he will be replaced in 6 months.
There is some validity in his comments, US is not healthy, there is extreme dietary issues, lack of exercise and eating terribly is rampant. But nobody complained about any other department head for not trying to solve that issue. But his past is very loudly negative.