Because it increases responsibility, when you are the who has to clean up the mess. It makes you care more to keep your system reliable and available, because y

Because it increases responsibility, when you are the who has to clean up the mess. It makes you care more to keep your system reliable and available, because your personal stakes are higher. There are some good comments here along those same lines. Of course getting a call middle of the night, when your system goes down because of an AWS outage you can nothing do about just sucks ;)