I'm sure you're right. Plus, in the sciences, he knows how his colleagues minds work (and all the politics). Dirac probably kept mostly quiet about his doubts b

I'm sure you're right. Plus, in the sciences, he knows how his colleagues minds work (and all the politics). Dirac probably kept mostly quiet about his doubts because Bohr, the Godfather of QM, thought QM was the Cat's Meow, which Schrodinger didn't. And Schrodinger knew that he pulled his famous equation out of a hat (not derived). Likewise with Feynman, who always repeated "nobody understands quantum mechanics." Too, because of the very competitive culture in the hard sciences, you don't talk about things that are poorly understood. Because if you make a mistake, you'll catch a lot of (friendly or unfriendly) ribbing later.