Thats because prison is a cake walk. I was watching a documentary a few years ago on history about one of the larger prisons in the US. A guy was there for life, but for good behavior his cell was pretty much an apartment. Had a TV, coudl come and go from his cell around the prions as he pleased during the day…
You get life in black dolphin, your days are spent in a 4x8 cell being watched by camera 24x7 with no windows and anytime you move your escorted face down ass up and a dog ready to rip your dick off if you flinch. Yard time is spent by yourself on a leash walking back and forth for an hour. Can’t kill yourself, you may get a newspaper, but for the most part you are not allowed to do ANYTHING
People would be less inclined to do dumb shit if the consequences were much more severe.