We have two massive parallel energy transfer systems in the world. And they are massive. Consider the electrical grid for all it's behemoth costs and regulations, at least it exists and is a known monster. Doubling it is a technical challenge but not an unknown. Akin to laying fiber. On one side of the grid you could even just change how the energy is produced at a few thousand plants and have zero change on consumer side if you wanted (for a given territory the size of a USA avg state)

Now imagine we came along and said we were going to add to the electrical grid a parallel system of transporting explosive liquid to billions of distributed combustion engines. Not only that, the explosive liquid is only available in a few politically charged areas in the world. Add all the tankers refineries pipes truck lines holding tanks pumps etc so that most people live at most a few miles from a holding tank that will distribute hundreds of gallons to them for their own micro power plant that only exists for their commute.

It seems crazy. We built both systems incrementally over time so we're in a massive sunk cost analysis whenever we think about replacing gas cars.