> A B-1 visa may be granted to specialized workers going to the United States to install, service, or repair commercial or industrial equipment or machinery purchased from a company outside of the United States, or to train U.S. workers to perform such services.
https://es.usembassy.gov/visas/commercial-industrial-workers...
Most other countries have similar policies. The line between those permitted activities and "work" is notoriously blurry. This often results in unexpectedly denied visas, and sometimes results in nasty letters or fines. It almost never results in this kind of show of physical force, even in unfree countries.
As with a lot of things, I'm not so opposed to enforcing visa rules for something like this but maybe the shackles and method of detention weren't all that necessary. Also worth looking at fixing the reasons why companies are skipping the proper visa process, because nobody at all should be (or is?) opposed to LG/Hyundai setting up a factory in the US. Things we should be doing with a helping hand are being done with guns drawn instead.
But we all know they're doing it this way for the populist theater, there's folks out there that want to watch fascist police state theater on the evening news.