I mean if they’re saying something like “don’t do this thing, because I did it and it was a mistake”. E.g. Don’t manipulate people for financial gain, because you will lose your friends and die alone like me". That’s good advice.

But if they’re saying something like “do this thing, because even though I failed, you will succeed”. E.g. Lie to people all you want, to gain what you want, just be smarter than me when doing it". That’s bad advice.

Advice given by the same person on the same topic, just with different morals.