genuine question: electric cars have to be worse per car on the environment than a gas-car right now?

reasoning:

lets compare the carbon footprint of the entire supple chain (production, maintenance, etc) of electric and gas(petrol) cars;

guess it is about the same (actually economies of scale for the gas-car side mean per gas-car footprint is lesser right now, but say electric cars also catch up at scale).

Then we are down to efficiency diff of the power plant vs ICE.

So would you argue: we will be renewable energy powered soon, at that point we need the electric car ecosystem?

I understand the push to switch to renewables. But there's enough load on the grid to soak up the production and clean up the air.