I think the tariffs are because the Chinese government seems to be pumping money into the electric car industry so they can keep prices artificially low and corner the market, then use their market position to extort other countries into giving in to their totalitarian politics. The more dependence we have on China, the more power the CCP wields internationally.
I think most western governments aren’t totalitarian dictatorships that are willing to burn through public funds in order to gain geopolitical advantages over their adversaries.
Do note that if China gains a market advantage, the price will likely go up to reflect the real cost of production.