I think it does relate to examples 2 and 3, although I would still differentiate between perfectionism in the sense that you actually keep working on something for a long time to reach perfection on the one hand, and doing nothing because a hypothetical alternative deters you from some immediate action on the other hand. The latter is more what I was going for here.
Another way of saying this is Don’t let perfect be the enemy of good, which Montesquieu wrote in 1726.
I think it does relate to examples 2 and 3, although I would still differentiate between perfectionism in the sense that you actually keep working on something for a long time to reach perfection on the one hand, and doing nothing because a hypothetical alternative deters you from some immediate action on the other hand. The latter is more what I was going for here.