Not defending the US here, but are you saying that overstaying your visa does not exist?

Their point was that this change applies to non-immigrant visas (which in theory are only issued to people who do not intend to immigrate to the US), not immigrant visas.

While true, the State Department already made the same change to immigrant visas a few days ago: https://travel.state.gov/content/travel/en/News/visas-news/a...