Yes. Which is exactly the problem. If cars cause traffic jams - never mind their other externalities only some of which are fixed by EVs - then that just means cars are too cheap and their true costs aren't reflected in their price. Cars are a classic tragedy of the commons, everyone in traffic would prefer that there be less traffic so they could get to places faster.
Describe how you think these “true costs” should be imposed. In the third world, infrastructure isn’t generally subsidised. People have to pay for everything. Yet cars, trucks, and motorbikes are still preferred - including EVs.
It is often a huge increase in a family’s quality of life once one of them saves enough to get a motorbike or ebike.