Ok this is a strange analogy. I think of it like a band. Seems like the Bands that really make an impact have some crazies in the band. Gn'R for example, just like the Bills, yeah they are great, but Gn'R weren't a bunch of process guys. Lots of ego, lots of attitude, lots of fight against everything set in front of them.
I know this sounds silly. But I think perhaps we just don't have that touch of crazy that may be needed.
None of this can be proven with stats or any facts. Just an opinion given, although not very well