You dont understand how supply and demand works.
Europe has energy deficit. When most ppl want to charge their cars (night) there is no solar power. We have no energy banks and all that power needed to supposedly charge tens of millions of cars would have to come from? Yes -> coal power plants, because our politicians decommissioned nuclear power plants. Lets tak about what is NOW and what can be in next 10 years.
In the coming 10 years vast majority of ppl still wont have passive homes with solar panels and energy banks to charge their cars, so they are 100% dependant on the grid.
Grid is old and not well maintained in majority of EU countries. It has finite transfer power.
Now we throw 500million cars on top of it. Its impossible mathematically and physically.
The moment number of electric cars starts growing, we will need more and more energy, this means more fuel for plants, more plants investitions, more grid investitions etc. It all costs money. So energy companies will bill you MORE and more. If not energy cost protections in countries like Poland or Italy, cost of energy would double next day.
Its all subsidised now, due to war, no fuel, Iran and many other reasons I already mentioned.
So overall its worth it ONLY due to subs and it can be worth it if we invest into our infrastructure for the next 30-50 years.
As it is now - its all just a hoax.