We're very keen on people who are very definite about things - even if it subsequently turns out they're wrong or delusional (or both). We're less interested in people who are less certain about things. We don't value ambivalence in our gurus.
Unsurprisingly we're wrong about this. The ambivalent investor is sometimes that rare thing, a genuinely sensible expert in a field dominated by loud mouthed, impossibly certain charlatans. And mostly it doesn't matter which side of the fence you favour, you'll be better off sitting on it.