Keep in mind there are dozens of other visa and immigration programs that we all just kind of lump under H1B as people who are getting replaced by cheap foreign labor.
If H1B was the only high skilled worker program then it's only about 60,000 people a year and it wouldn't really have much effect. But it's one of dozens of programs to bring in cheap labor.
The frustrating thing is as I pointed out on another comment without influx of immigrants we're going to go into a massive recession just like Japan did for the exact same reason and it's basically a permanent recession. However when those immigrants come here they take a limited number of slots in our society where someone is allowed to be a functioning adult. So you're basically trading social stability for economic recession.
If our economy did wealth redistribution so that the money generated by those immigrants didn't just line the pockets of a handful of Epstein class members this wouldn't be an issue but well, if wishes were horses beggars would ride.
Assuming our civilization survives the AI apocalypse, and I don't mean kill a robots I mean huge amounts of automation creating massive unemployment and leading to conflict in war, then it's a problem we're going to have to deal with anyway though because the entire planet has plummeting birth rates because we demand women into the workforce and women in the workforce don't crank out babies so it's going to be a problem we have to deal with someday but like I said, right now the solution seems to be to give religious lunatics the launch codes for nukes and let the Epstein class members hide out in there bunkers while we kill each other