Batteries don’t really explode, they combust. The metal cage usually outlives its ICE engine as well.

Hydrogen fuel cell vehicles either need extreme insulation to keep the fuel cool, otherwise it has to vent some fuel or risk exloding, or extremely strong pressure vessels in the car to maintain the hydrogen in a liquid form. A metal cylinder constantly expanding and contracting while simutaneously seeing extreme temperature changes is going to wear out much faster than the frame of the vehicle.