People frequently insist that the only way to thrive in the world is to be a solid B-player, that everyone has to “earn their stripes”, “grind it out”, and “soldier on.” You must “do what’s expected of you” because “that’s what responsible people do.”
It also would explain, evolutionarily, why the depressive part of manic-depression never disappeared. The depressive part sucks, crashing sucks, I hate it so much, and I wish I could make it go away. But I think you’re literally burning from your emergency reserves, turning off many of your other core systems, and channeling all that power into your artistic or intellectual faculties. That’s where the power comes from - your body and mind are burning itself up.
A good read to anyone who has to deal with this.