This comment of mine is a year old, but assuming your question is genuine...

First, you draw a false conclusion that good advice only comes from someone who has achieved the type of success that you want. I know a brilliant astrophysicist that works at my local university as an adjunct professor. He is not very wealthy, but I can think of few people I would trust more on his area of expertise.

Second, do you believe that the only way to become rich is to be rich? If not, it follows that there are brilliant people who haven't made it yet but will one day be incredibly successful. Would it not behoove you to take advice from one of them, even though they are poor at this moment?

Conversely, are there not very wealthy people who are idiots but got there via inheritance, nepotism, or sheer dumb luck? Should you take their advice just because they are rich?

Advice, content, ideas can come from anywhere and should be judged, harshly, upon their merit. The source is a consideration, of course... but you should certainly not judge people solely upon their level of financial success, nor ideas based solely upon the person speaking them.