https://www.uscis.gov/laws-and-policy/other-resources/unlawf...
Note particularly the following:
> Asylees and asylum applicants: Generally, time while a bona fide asylum application is pending is not counted as unlawful presence.
So unless there's currently a huge backlog of people staying here illegally who are somehow eligible for green cards in spite of this fact, the government changing it's policies to require new applicants do so from overseas is not itself causing these applicants to violate immigration law.