I was under the impression that there were more secure federal prisons, like places in colorado that are built mostly underground. But who really cares, anywhere where you are isolated to that degree, where you get little to no human contact, are, by definition, inhumane. Isolation like that is LITERALLY torture, and the fact that we STATE SPONSER IT is a fucking travesty.
And as to your 'friend', I know all my dude's well enough to know they aren't out raping and killing children, IDK what to even say about that one. But If your view of prison is based on the fact that you think all inmates are like that dude, well, then you're just wrong.