This is not a frivolous question. The battery in my car is at the very back of the tailgate. And the tailgate is -- you guessed it -- electrically operated. So when my battery died, the tailgate wouldn't open and I had to get into the passenger compartment, so I could disassemble the trunk area from within and finally reach the battery. Installing the new battery was even more fun.

So yes, having everything dependent upon electricity is not a good idea.