I didn't see them playing scared. I saw both teams playing fantastic defense.
Neither team could get much going and it was just a few plays here and there making the difference.
We didn't go to TD because they were doubling him. We couldn't really do much with TP with Lebron on him (TP might be able to get by him, but with the Heat's athleticism closing on him, he wouldn't get a clean shot at the rim and Lebron would likely be able to recover for a block).
I can take issue with some of the bad passes and missed assignments of course, but a lot of the decisions that turned out badly were judgment calls and with a team as talented as Miami, it's always pick your poison.