While being a political move, the banning and taxing of chinese products is also a safety issue.
We have regulations products need to meet to be sold in the US, that has nothing to do with tariffs.
Want to make America electric? Make em cheap.
The only way to do that is competition. The ideal company under capitalism produces nothing and charges infinity dollars. You can’t just give the companies endless tax breaks and subsidies, you also need to force them to actually sell the product at a cheaper price, and you can’t just expect them to compete without any external force because it’s most profitable if they all keep prices high.