What else could he have done? Gio gave up 4 and Hamels is a great pitcher
Hamels walked three batters in the first few innings. No one bunted to advance runners.
Hell, Bryce Harper comes to the plate with runners on 2nd and 3rd with one out and Bryce who doesn't hit lefties at all doesn't even try to squeeze the runner home. Davey Johnson always plays for the three run homer and that's why he's a bad manager.
If you score a run here and a run there, the deficit isn't as large when Gio collapses.