They don't rely on their bigs, they mostly play small ball. Gasol is the only big in recent years effective enough to keep the Warriors play Big.
Let's be honestly, the Raptors beat them at both ends and is the better team. The Warriors' defense slides badly this year. Iggy and Livingston both lost their shots and GSW can't even score enough to keep afloat.
Although KT shoots well tonight, his defense is not there (try not to re-aggravate the injury) and it's hard to be optimistic after this 42-min game. They need miracle in Game 5 on the road. KD I think he has a slightly torn achilles and won't be back.