I feel like there's probably a pretty big difference in how it feels between voluntarily going into solitary for 48 hours by your choice, only for 48 hours, and

I feel like there's probably a pretty big difference in how it feels between voluntarily going into solitary for 48 hours by your choice, only for 48 hours, and being in there for months (or years!!), with no known end. There's also a big difference between "ruling out it's use entirely", and having hundreds of thousands of people in it every day. It is not treated as a last resort in the current US incarceration system.