We must be reading different things. In the other post about this topic (https://news.ycombinator.com/item?id=45305845) there were lots of discussions on the benefits of changing how the H1B program is run, with many in favor of this type of change.

I can't speak for others, but for me this seems like

1) a shakedown of corporations and / or

2) a way to ban immigration without being technically a ban

But overall I see this as another anti-immigration "policy" that's coherent with the rest of the anti-immigration policies from this administration. Hence the pro-immigration arguments.