The California grid issues were due to momentarily high demands on the grid, not an issue with creating capacity in general. The grid is not infinitely flexible.

Coal plants, mind you, aren’t a good solution to the issue of active spikes demand, they take significant time to ramp up and down and have minimum loads they have to put out, it’s prohibitively expensive to turn them of and on.

EVs can, and likely will play a key role in demand management, that’s a good thing.