“But beyond that, power plants need energy sources to generate electricity. Your response doesn’t address that.”
Correct, the move to EVs might not required new powerplants, but each of them will have to burn a lot more fuel. Today in the US that will cause a large increase in demand for natural gas.
There will have to be more power plants for the growth in Electricity use, and they need to be building them now, not later. Wind and Solar will not be able to supply what is needed.