Some countries still have the death penalty, for example in my country. And there are some people who seem more satisfied when they receive the death penalty. Maybe they've gone through a prison time or two before. Death is easier for them than living in a place of oppression, mistreatment and constant abuse. They are not well protected and they don't want to come back again, especially life sentences.
Legitimate fairness, solid legal foundation in Vietnam is low and needs a lot of improvement.