Labor is not the only cost in that equation though, there's business regulations, the cost of the operators/repair that troubleshoot and repair the bots when they break, etc. a lot of which could be cheaper still than the price of a container on a slow ship from China.

China doesn't have to ship parts across the ocean. US manufacturers do, because we gave up the whole bottom/middle of the manufacturing supply chain to China decades ago in pursuit of lower costs. In China, the maker of the parts you need to build your product is a few blocks away. In the US, the maker is in China.

And, if you need changes, you can go talk to them the same day you see a problem.

There are more competitive advantages such as expertise, supply chain, regulations, capable government, scale... If it were all price, there are countries that are much cheaper than China.