Originally Posted by kaldaniels
Yeah Vegas accounts for that. Otherwise you are right, you could bet on all the unders and you would come out ahead. But they probably trim 5-10 percent or so off a full healthy season projection.
Vegas only measures public opinion of betters, they don't actually measure the sports/players. The goal of any Vegas Casino is to have their odds directly in the middle of all the people placing bets (50% bet above, 50% bet below).
This way they can take 100% of the "cost to play"
Edit: I now see this was addressed above by AtomicDumpling as well.