What is actually being avoided

Once you see that, the question changes shape. The problem was never the content of the doubt. The problem is what not knowing does to you.

Some people find not knowing genuinely intolerable, independently of how bad the unknown thing would be. It is the not knowing itself that is aversive, and the response is to search, to ask, to check, to get information, to make the uncertainty go away.

That is a describable, studied thing, and it is the actual target. Not the doubt. The intolerance of the open question.

Which is also why more evidence has never helped for long. You were never short of evidence. You were short of the ability to be at rest without a final answer, and no amount of evidence supplies that.