Imagine a problem domain where you have a list of projects everyone agrees would be good to do in the fullness of time.
A trap I've seen a lot in my career is to spend a ton of time prioritizing/coordinating on the precise, optimal order to build them.
The optimal sequencing might be 1x cheaper than the non-optimal sequencing.
Discovering the optimal sequencing is hard, because there will be lots of uncertainty that won't resolve until later.
The cost to coordinate in uncertainty and identify the optimal sequencing could easily be 10x - 100x more than just picking an arbitrary sequencing.
On net you could spend 90% of your time and effort basically bickering, and only 10% building.
In these cases, it's better to simply pick a good-enough sequencing, not even pretend it's optimal, and just start executing.