To expand a little, since the org wants accurate estimates we need to accurately measure throughout and the total quantity of work. Though throughout trends stabilize pretty quickly, the system falls apart when one task reveals another. Accurately breaking down and costing every sub task at sub-week granularity for a multi-year project is an almost insurmountable task. It requires effectively doing all the work in your head.

I’ve seen one compromise and benefit to the system:

Compromise: push back on scheduling until the date you give for coming up for a date of completion. This works best during the final phases of development.

Benefit: with weekly throughput info, it’s easy to tell if someone is trying to do too much in a sprint.