Have you ever actually been on call? The issue is, you are not free for one second when you are on call. Maybe you never get called, but you still can't do an

Have you ever actually been on call? The issue is, you are not free for one second when you are on call. Maybe you never get called, but you still can't do anything that takes long to disconnect from because you have to be able to get to a computer within a reasonable amount of time because the one time you do is when you finally will get called (and if the company is low enough to ask you to be 24/7 on call then they probably won't mind firing you the first time you're a little late responding to an issue).