Actually it is not. Gas can be stored. Gas can be transported in appropriate containers. I don’t see anyone hauling generator and fuel for one in Tesla.
Sure but how many people actually store enough of it and store it properly?
Remember most EVs get fully charged every night.
Even though you might have less overall range when full the fact that it is full means a lot when everything just stops for miles around you.
few to none are hauling a genset with them.
Power outages in california often have no warning like a hurricane or something you can see coming miles away.