Umpires are paid by the league to make correct calls. They fail that test egregiously, particularly when calling the strike zone.
Bautista absolutely touched home, but yes, Lawrie was not on second, that was a bad call in our favour.
An ump making a bad call is not "luck", it's someone not doing their job well. The technology exists to do a better job mechanically, so it should be implemented (and the replays are a step in the right direction, Maddon just derped hard on which challenge to make tonight...)