Yes the power plants can pump out enough, but not all transfer stations are able to handle the load, each individual hub, may not be able to handle the load.
It’s far more nuanced than this even, but don’t believe everything everyone is selling you, everyone has an agenda and no one is going to tell you the entire truth.
If an entire block suddenly goes EV one night the infrastructure isn’t there, it’s slowly being updated which you don’t see, but there’s issues out there.