Electric vehicles use a lot less energy in total in the supply chain than gasoline cars (extracting and refining and transporting oil uses a lot of energy too, some of it electricity).

So electric vehicles reduces the energy required.

Longer term: Gasoline cars are not viable at all; electric cars are viable to the extent one can secure the energy for them. It is a way of getting any road transportation done in the future AT ALL; that is surely not a con?

I hope noone is arguing that moving to electric cars by itself is sufficient to stop climate change. That would be a con but also seems like a strawman.

The goal should be net zero, and electric cars are needed to have road transportation at all.