You can’t say you don’t care about specifics when the specifics specifically refute what you’re saying.

You can ignore the difference between legal ports of entry and the rest of the border, but the entirety of border law is built upon this difference, so ignoring this difference immediately makes you irrelevant among all professional discussion of the border. There’s also a massive difference between closing the border and closing the border in areas where it can’t be regulated, which is what the Biden administration did, the border is not closed.

“Border Cops” aren’t the ones doing the investigations into Cartel and terrorist group members, that would be DHS. There’s a massive difference between DHS getting the name and identity of a terrorist, putting them on a list, their name coming up to Border Control at the border, and then Border Control holding them until DHS can investigate, and “every immigrant is detained indefinitely with no lawyer in terrible conditions” which was your original claim.