You usually want to only bet certain games. That is your one advantage over the books. They have to play every game, but you have the advantage of not playing a game.
Some bookies though will give new betters a free point on every bet, whatever their bet, if they bet every game. For most people, this just means they lose money faster. A good capper can win a lot, though.
Not sure why he is playing every game, but that could be a reason. Most cappers would agree that most lines are very tight and a given player will only see value in a couple lines per day, and sometimes none.