Some here would rather win 53% of 10000 plays than 56% of 100 plays. Yes, the EV is higher, but if the number of plays covers the same time frame, I can bet more per game in the latter. I try to be 2% of my bankroll on most plays, so if there are too many games to bet, I have to pass, especially at The Greek, because they usually have the best lines.
(Clearly the 10k vs 100 comparison is exaggerated, but my point is that if I have 50-100 bets in my bankroll spread across a handful of books, I prefer to only be a bettor on the better bets.)