My opinion, based on playing a lot of tourney's off and on over the years is......In questionable situations where you may think you have the best hand, even putting your opponent on weaker hand than yours......it is sometimes better to fold rather than put your entire chip stack at risk. You may win those situations sometimes....but..... I personally think it's better to wait and pick a better spot unless your shortstacked......It's hard to play like that and takes a lot of discipline but it is mathematically intelligent