Celts got lazy. And the Lakers made 7 of 9 three pointers in the 4th!!! People seem to miss this. If the Lakers are counting on those percentages even against poor defense, that ain't gonna happen. 5 for 9 and we win by 12 and the topic is dead. Lakers were in full scramble mode, run down the floor, take a quick shot. They do this for 48 minutes and the Celts play decent defense, that will be a recipe for a Celtics win.
Pierce was no more a liability than anyone else was then. Right now, Pierce has all summer for his knee to heal -- he should play as much as possible, and his past durability and pain tolerance shows he WILL NOT significantly lose his effectiveness.