I agree with sssilver in his disagreement, but there's a nuanced logical flaw here that's not even being addressed.<p>sssilver brings up that someone who has experienced failure in x isn't <i>necessarily</i> a poor source of advice in x. Similarly, just because someone was successful in x doesn't mean that they have <i>any</i> clue what they did right.<p>A more defensible bit of advice would be to evaluate someone's credibility before taking their advice, but I can't think of a more obvious truism.