Producing that enormous battery pack is nasty and stinky and noisy and polluting. It's just a cost that's paid upfront and the pollution is done in someone else's backyard.

It's paid up front once. That battery is going to keep being a battery for the rest of its commercially viable lifespan. The gasoline just gets used up and you pollute over and over again to maintain having power.

Better theirs than mine or yours.