What I think matters, is where we are going, not where we are. You give China as evidence of the human dominated state of manufacturing. I give it as evidence of the shift toward robot dominated manufacturing: https://www.technologyreview.com/s/601215/china-is-building-...
My fuzzy recollection is they sold out to Levi's, which mismanaged it into nonexistence. The patents prevented replacement. And the stitching factory used eventually died.
So at least some partially-automated traditionally-low-margin industry is/was possible in the US. But the usual issues of losing needed industry infrastructure still apply.
It's not a huge technological leap from "robot learns to play Dota" to "robot learns to stitch baseball gloves". Machine vision and reinforcement learning were always the technologies holding back interesting applications of robotics. And now they are basically solved problems.