You've seen the adverts, perhaps. “We identified 15 fund managers who consistently outdid their peers over the last ten years”. What's the deal here? Do they believe their own hype, I wonder? I would be surprised if among 8000+ fund managers, they could not find 15 who fulfilled some level of performance. But that doesn't mean it's by ability – it would still be the case if fund management performance were driven by luck.
Still, relying on people not being able to accurately judge probability or understand statistics isn't a bad business plan I suppose.