"Really that bad for whom?," I think is the question.
You can find some horrible photos out there of snakes who became the prey for a hungry mouse. If you never leave a snake alone with live prey, that won't won't happen to your snake.
Death by constriction is fast. Based on videos of both, It looks faster than the CO2 method. Nevertheless, one of my hatchlings took its pinky last week without first constricting it. The poor mouse just went down live and crying. I felt sad for it.
People in the modern world have become ignorant of the Facts of Life.