Just take a look at the categories of Green Cards available on USCIS' website[0], and think about how many of them will be unavailable if you're back in your home country.
* Green Card via Family? 18 months, minimum, for approval.
* Green Card via Employment? Well, self-deporting likely means the loss of said job opportunity, thus your ability to convert to LPR status
* via Special Worker? Here's hoping you're not an Iraq of Afghani national that might be persecuted back in said home country for cooperating with the US Government.
* via Refugee or Asylee Status, or as Victims of Abuse? Are we fucking kidding, here? Forcing refugees/asylum seekers/abuse victims back to their home countries is deliberately cruel, and I'm going to be looking for statistics on changes in approvals pre- and post- this policy change to make sure "special circumstances" are actually recognized as such
It's just a despicably cruel policy change that's so overtly xenophobic, it actually reveals the alignment of those reporting on it when it's not called out as such. It's the antithesis to legal immigration in that it all but destroys the process entirely, promoting more illicit behavior (dangerous and clandestine border crossings, exploitation of migrant workers, human trafficking, etc) in the process.
Fuck this regime.
[0]: https://www.uscis.gov/green-card/green-card-eligibility-cate...