I'm not saying they shouldn't consider another way, but all the team has done is win and score runs with him doing it, and he's also the team's second-best hitter so you want him getting all those ABs.
Marsh. Rojas, Stott - all not good enough (and also not good enough to be on base for Schwarbs). Turner should be but he was in the deep slump when they tried it the first time.
Harper would be good but, same issues (you want him hitting with men on base and also he hits where he wants to, which is third).