Sure, however backing up a bit and going a bit pseudoscience, let’s think about it evolutionarily.

If you’re a young confident fella who thinks he’s got a great lion fighting strategy but no experience you end up not existing. The lack of confidence is not a problem it’s a feature; it saves us in the long run against risks.

I have zero proof that high confidence people are more or less (or the same) able or capable than the general population.

But the point is deep down anyone “judging” you can eventually substantively evaluate your credentials/capability. It’s not a good long term strategy to be a high confidence shill / hype person. Probably better to work on being more technically competent. Now if you happen to have a personality issue / disorder that causes excess shyness, sure go fix that. But confidence in itself, imho, is an overhyped tactic in American life.