Because driving is unsustainable and destroying the planet. It can not be allowed to continue in its current form so the easiest option would be to push people away from it when they are able to.
Better options need money, unfortunately. And barring a complete change in how the US works [1], that money isn’t there at a federal level. That leaves cities with no other option than to pay for a better option on their own — by raising taxes (e.g. congestion pricing, gas taxes, tolled roads), which also has the side effect of disincentivizing driving
[1] the infrastructure bill that’s looking to pass, while it gives much needed funding to public transit, still centers car-centric planning, and nothing paradigm-shifting (e.g. a comprehensive regional high speed rail network, a dedicated bus line on every street, a protected bike lane on every arterial) will likely come from it.
If I say "I will give you $20 to not drive" or "I will take $20 from you if you drive", the only thing that really matters is that there is a $20 price differential between two actions so you will be at a $20 disadvantage to do the current thing regardless of how you word it.
Money and wealth is relative so the actual final amount doesn't matter as much as how much you have compared to the average person.
7.5% or so of total greenhouse gases isn't destroying the planet, but it's not helping either. EV's going to take this to about 1% this in about 10 years.
The number of electric cars sold in 2020 was ~250k.
The average age of a car in the US is 12 years.
If electric car sales quadruple each year until they reach the total number of cars sold in the US (around 16 million cars per year), it will take at least 18 years to replace all the combustion engine cars on the road.
And this is wildly optimistic, electric cars are too few and too expensive, even as second hard cars, for the general population. I estimate that they'll reach a sort of break-even point with combustion engine cars around 2025 or so. So you can probably add 3-4 more years to those 18 I counted. So at least 20 years to have a mass replacement of existing cars on the road.
And in the rest of the world it's even worse. The rest of the world is poorer, has lower disposable income, cars are around for longer, and electric car sales are ramping up even slower.
I'd argue installing more solar panels is way more important than EV's. It's way cheaper, offers way better ROI (EV TCO are just barely cheaper than gas, especially without gov incentives) and helps with main problem - power generation. Sure it's boring af, regulated, politicised (Uighur solar) and inconvenienced in every possible matter...
I think both are needed. Nothing on its own will work and we need to be doing everything that we can at the same time right now. The current models are showing if we make every improvement we can right now we are only just barely scraping by. There is no time to do everything sequentially.
Why do so many people want to play dictator these days?