I do not want to put words in your mouth, but it seems to me that you are trying to extrapolate from your own experiences and attitudes to something universal. My experience is that really important stuff does not get done automatically. Sometimes it gets done in a panic, and other important things get neglected. I spent some time yesterday grocery shopping for my elderly parents and then spent an hour with them in their apartment visiting. If I don't shop for them, they don't have food for lunches. However, I have a lot of other things to do that are important and/or urgent, and they all have to be done too. I need to be an effective errand-runner precisely because I have other things to do besides run errands.
p.s. Maybe you should change your nom de plume if gtd isn't doing it for you?