Doesn't sound very healthy, tbh. Also takes an extraordinary amount of courage to be that confident in your own assuredly-flawed judgement. All it takes is one person changing your mind to ruin your life.

Sorry, that doesn't make much sense.

Which part is the antecedent of "that" here? I made three distinct claims. Happy to explain more if you clue me in to what doesn't make sense.

I don't get how one person ruins my life by changing my mind.

Well, if you've devoted a significant part of your life to neurotically analyzing your own actions in order to comply with a certain set of values, changing one of those values will naturally imply reevaluating of much of your life. I think realistic expectations of yourself for not living up to your own values is important to maintain basic resilience.

Not to mention, we all have behavior that's fundamentally contradictory to our values. At least, IMO.

Not at all. It's more like finding bugs, fixing bugs. It would be foolish to not course-correct when realizing you're making a mistake.