Getting to "I Don't Care"

I had this idea last night that, in order to get anything done in any way that is really one's own, one must get to "I Don't Care". Not giving a damn is a requisite for making something that will truly reflect the will of the author, to adequately and accurately articulate an idea in one's own voice. As individuals in the social body, though, we are taught to care about others' perceptions of us and our actions. Our educations instill voices in our heads that can block us from acting upon what is in our hearts. It takes work to get all of those voices out of the room, for sure. But then there is another step, which is getting to the point of genuinely not giving a throw. If this is true, then it would help to explain why so many people work well under pressure: There is no time to care, no time to wonder from every perspective, time only to finely concentrate the mind on the task at hand.