It's true people usually have correct odds to chase in limit but they do't chase for free, if you have a made hand you try to charge them as much as possible and occasionally you can make someone make a mistake by calling with odds they just don't have for instance.

The turn comes I bet, fnord next to me raises the person next to him has to call 2 bets cold to chase whats usually a 4:1 shot. He would need at least 10BBs already in the pot and be drawing to the nuts to make it worth it.