I'm sure this is true for some people. But humans tend to adapt their levels of happiness fairly rapidly, even when they predict they would be extremely unhappy

I'm sure this is true for some people. But humans tend to adapt their levels of happiness fairly rapidly, even when they predict they would be extremely unhappy. For instance, many paralyzed folks end up feeling not as bad as they would have thought. In a decent prison, it's quite plausible that you might adjust rather rapidly. Still, forcing someone to continue to exist is cruel and they should have the option to opt-out, after a cool-down period and counseling and other safeguards.