In its most general sense, prescriptivism is the view that one variety of language has an inherently higher value than others, and that this ought to be imposed on the whole of the speech community.
I avoid grapefruit juice because my doctor says it affects how my body handles the Lipitor I take for my cholesterol. Should I also stay away from pomelo?
While most people will still probably need, and be, to some extent, clock-timers, task-based timing should be used when performing a job that requires more creativity.
He should become a lunatic, risking everything for the sake of his dangerous fantasies, capable of exaltations, ready to die for all that the world has as well as for what it has not.