In no way does China have technical superiority.
China has technical superiority in a number of areas. Not across the board, but in enough things that we should care. Battery technology is the primary example. Solar panel technology, they may not lead the world, but they certainly lead the US. Manufacturing of small items, they are years out ahead of us, we gave that up, we can only cost effectively build large items now.
the only reason they are the place to make these is because of slim margins and dumping practices
That's how they became the #1 place to make those things, which in turn is how they became #1 in technology to make those things. They copied their way to understanding the tech. That saved them a lot of time and money. Now they lead in several areas. Pretending otherwise is foolish. A lot of goods sold around the world are now not only manufactured in China, they are designed there as well. Corporations in other countries are buying complete goods, not just parts, and having their logos put on them.