Yet US prisons do solitary confinement. It is estimated that 4% of inmates are wrongfully convicted(innocent, at least of the crime accused). Inmates have diminished capacity of communication, consumption, safety. There are a disproportionate populations in prison to respect to crimes actually committed.
Your indignation is just because you value freedom very lowly. It is true that another man's freedom is so worthless to oneself that it doesn't sate your thirst for vengeance.
This is nonsensical. If we valued freedom, we'd make prisons into resorts?
Prisons are intended first and foremost to punish criminal offenders and to deter them from committing additional crimes by removing their opportunity to further offend. If they were luxurious, you'd get plenty of people who would commit crimes just so they could keep enjoying the life of luxury you propose. Not every cares about abstract concepts like freedom.
US prisons are also not as bad as most people think. In the real world, they're mostly like Orange is the New Black, not Oz.