Agree with this. Don't think there are too many mathematicians who can really argue for or against a really important theorem. My prof has come up with one for Riemann hypothesis[1], but he is not finding anyone willing to engage in a discussion. Most mathematicians seem to believe that the Riemann hypothesis is unsolvable and I don't think it helps that my prof is currently not associated with any reputable university. It's as if proofs can come from only reputable universities and reputable mathematicians.

[1]https://medium.com/@nutanc/the-final-and-exhaustive-proof-of...