Lets assume all this is true, why should i be concerned about it?

If the Chinese tax payer is going to help me buy a new car then thanks, my own government isn't going to do that.

The Chinese tax payer isn't voluntarily helping you though, it's China's forced resource extraction from its own citizens (wage and QoL suppression), to maintain a stranglehold on global manufacturing. Everybody (except your specific car purchase) would be better off if they used these resources domestically. Do you think they'll ever want payback? if not from you, then from the next generations.

Because over time when your own industries suffer and then become jobless, your country is less secure and wealthy.