Almost like we should focus on making the US better / competitive instead of trying to succeed by blocking others.

That's against the interests of the u.s capitalists.

Don't we get a ton of components and raw materials required for EVs from China already?

Yes but they get shoved into dogshit u.s cars who's prices are raised many times more than the cost it was to make the damn things to scalp the average American of more of their dwindling wealth