What's considered a productive life could be subjective. And why should that be the ultimate goal anyway?
It shouldn't. But choosing to subscribe to established concepts (money will make me happy, marrying rich will make me happy, etc), is the easiest way to deal with the question: "what makes me tick, and what makes me happy, and what should I do in this life"
In that context, it would be more about the number of tasks in your time table instead of how well managed the time is for each one of them (or overall). A schedule with a lot of tasks (context switching), will not serve ADHD person well.