I remember when Walmart stores had signs saying they tried to compete selling as many US made products as possible.
They finally had to abandon that when the competition started eating them for lunch with lower priced imprt products. Had they stayed with the american only policy, they would be only a memory like woolworth stores.
Much production from China is good quality, I am generally quite satisfied but it seems slow moving limited production parts are made in mostly small, backally shops in china where the can not or have no incentive to produce a good quality part that fits and works. I had the same bad experience with the incredibly shoddy workmanship of a small US company that built the Hoof / Roof governor for my Spra-Coupe.