The buyers of electric cars don’t need incentives. They just need available cars.
But the problem with electric cars, are many. Heavy expensive batteries that discharge rather quickly and charge quite slowly. The life of the batteries is also a problem posing a $5000 + investment every 6 or 7 years, and of course the recycling of them. The limited range is probably not a big problem for most users. Those who have longer commutes will not buy them.
Additional problem; Quick charge solutions will add to risk and potential explosions of the batteries. And will also reduce battery life.
Are any battery technology breakthroughs on the horizon. I don’t see any. The batteries convert electrical energy into a chemical reaction, and then convert it back to power the vehicle. Regardless the actual power which comes from the batteries must first be delivered from the power grid.
Your reasoning is good. In addition, consider what might happen to that "chemical reaction" in a bad accident.
I've been driving the same Ford F150/300cui/6 cly truck for 15 years. 6 or 7 years $5000 reinvestment.....NOT!!!!