I dont think it's as simple as that, after all there are book written about task management.

When "something" comes up, it's not always clear to me whether it's urgent or not, important or not. Getting it out into a list frees my mental capacity.

For example, I got a reminder to renew my passport yesterday. Not urgent, but important. Goes onto a list. I'll eventually prioritize and schedule it in my weekly review.

The key (for me) it aggressively devote attention to pruning these lists.