Having no expectations is better than having low expectations.
Low expectations are a way of setting yourself up to lose but rationalize that loss as a win: Either you were wrong, which sucks, or you were right, which also sucks.
No expectations, on the other hand, comes with a decided benefit: It's easier to react to unexpected outcomes because all outcomes are unexpected.
It may seem counterintuitive but turns out there's a lot to be gained from not creating an emotional investment in some prediction which, for all intents and purposes, was selected at random.
