Credentialism isn't a fix for the problem you've outlined. If anything, over-reliance on credentials bolsters and lends credence to crazy claims. The media hyper-fixates on it and amplifies it.

We've got Avi Loeb on mainstream podcasts and TV spouting baseless alien nonsense. He's a preeminent in his field, after all.

Focus on what you understand. If you don't understand, learn more.