Passing a constitutionally valid law through congress and then having the executive branch enforce it would not meet any judicial resistance.

I suspect the courts would welcome it.

Maybe they should stop trying to do illegal things.

Is this thing they're doing illegal?

No, just selective enforcement and maybe sending a message that if you don't behave, the administration may look a bit harder into you than it normally would.

What is the evidence of selective enforcement?

I don't have evidence, I am operating under the assumption that e.g. folks behind jobs.now [1] did their homework. This is also what the OP of this whole thread claimed. [2]

[1] https://www.jobs.now/blog/unveiling-the-truth-about-h-1b-vis... "The Jobs.Now team has reviewed job postings from dozens of top companies like Meta, Block, Doordash, and Netflix which require unusual application processes like emailing or paper-mailing the application to specialized addresses, or using unbranded separate websites for collecting applications for jobs." + search for occurrence of "Apple" [2] "My understanding is that this is pretty much how everyone does it, no?"

Why would you give this administration the benefit of doubt?

No, it is meeting resistance from judges that follow the law. It is also meeting support from judges who dont care, including majority of supreme court.