The problem with this mentality is that is impossible to create a zero emissions grid with just batteries. You'll find that long-duration energy storage is necessary. Except this can only be solved via hydrogen energy storage. So even EVs will just be hydrogen powered cars in a lot of respects.
Compared to fuel cell cars, especially plug-in fuel cell cars, EVs are the unavoidable loser. They'll be more expensive, heavier, and generally will have shorter ranges while failing to produce a real efficiency advantages.