obviously not everything he touches turns to gold...you cant polish shit. but he is a guy who can push Richie and Richie himself wants to prove himself to him as well i think..
There is a myth around some producers like Bob Rock and Rubin, some artists have called them gods/magicians whatever and other charlatans..the truth imo is in the middle..there were lucky enough to be in the right place and time and collaborate with huge talents on their prime, but they also had the ability to take the best of them and deliver it in a sonically great product.