Earlier quoted context omitted.
HN changes my opinion on things all the time. If your beliefs never have to stand up to challenge, your faith in them being correct should be very slim.
If your beliefs change all the time, they can't have been held very strongly or justifiably in the first place. Maybe you should stop having beliefs like that. That's direct evidence that you shouldn't be confident in many of your beliefs, given they change so often. A person with stable beliefs, even if they aren't ever challenged, has no such direct evidence to suggest they should be less confident, they can only h…
That's like saying someone who comes up with a bunch of scientific hypotheses and never tests them should have more confidence in them than someone who does. Holding on to your beliefs even in the face of evidence/arguments to the contrary is not a sign of having better or more considered beliefs, it's a sign of arrogance. If you truly think that you're never wrong about anything so there is no reason to even look for contrary data, that is especially arrogant.