I don't understand what you're advocating.
Do you think it's a bad thing that the US implemented occupational safety laws?
I agree that it's not great that many of those risks just shifted overseas, but it's certainly a net positive that American employers can no longer let workers die or get permanently injured and just let the workers absorb those costs.
The H1B visa system isn't just a natural part of capitalism that I want the government to regulate. It's an artificial condition created by bad regulations. You can argue that we shouldn't have immigration restrictions at all since they're an artificial economic constraint, but that's a whole other argument.