I would say in the early stages in a MTT this is sound advice. It the mid-late stages, I found that people tend to loosen up in attempts at stealing the higher blinds, thus resulting in more oppurtunities in getting bigger pots if ya got the cards to catch em doing it. Catching blinds thefts(who often times will try to protect themselves when you reraise them) in the late stages and end game has helped me come from dead last bubble to take the lead very late in MTT, so i try to stick around and just wait for big hands, and let the looser crazies go at it.