A surprising amount of maturity is learning which problems deserve a solution and which ones deserve to be left alone until they become someone else’s problem.
This is not irresponsibility. This is resource allocation.
Confidence is useful, but it has been given far too much credit.
A person can be completely certain and completely wrong, often at the same time. Meanwhile, the person quietly saying “I’m not sure” may be the only one who actually understands the problem.