they keep the good stuff for themselves.

Do they? If anything, I believe China's been exporting the high-end luxury items because they have absurd margins in western markets. Meanwhile, the good-enough goods stay at home, because it isn't worth the time or effort to sail them across the ocean and market them.

I guess Temu and its peers have changed that, to a degree. But so much Temu crap just gets bought up by local American drop-shippers, marked up to American prices, and rebranded as western equivalent merch that it feels like much the same.