His competitors already have economies of scale, they are incumbent carmakers that build tens of millions of cars every year.

Volkswagen has a market cap of 40B, why do they need to government subsidies to build a new car?

If you truly care about wide-scale EV adoption above all else, why not advocate for opening up western markets to Chinese EVs? The availability of a 10k EV would do far more for adoption than giving taxpayer money to billion dollar megacorps.