Well, you certainly wouldn't sit that LHB, he rakes! 
One doesn't have to entirely agree with it but it's hardly a surprise, and it's not like the LHBs sitting on the bench strike fear in the hearts of opposing pitchers either (but especially not LHPs). Kepler hasn't started against a LHP since April 2, and Stott only got back in the line-up after Harper got hurt.
I wonder why Rob Thomson is the winningest Phillies manager of all-time, hmmh.