Are Re-buys a better return on investment?

I've notice that many very good tourney players seem to play alot of re-buy tourneys. I get this feeling from checking out players stats on PokerDB. I've always tended to shy away from these because of the early "looseness" of the games. I'm thinking now that I've been all wrong. Maybe getting in with the intention of spending 4 buyins is a good idea.

I think many proffesional MTT players like to play re-buys because of the earlily looseness. It makes for a more juicy prize pool and therefore more money to win. As these players are going for final table spots, not just ITM spots, they want the money to be as big as possible. It also means that if they go out early on a flip or a bad beat they can go straight back in!