Makes sense. For someone who can't tell the difference between good advice and bad advice, it is no help that both good advice and bad advice is out there. Telling them the difference is useful.

But the problem is: Why should we trust you that the selection of good advice you made is really good?

No offence meant, it's just an observation that many people posting bad advice also believe in what they say, and believe in their ability to tell good advice from bad advice. What evidence is there that they are wrong but you are right?