Nobody builds momentum while standing around discussing whether momentum is possible.

Momentum is generated by motion and cannot be arranged in advance. Discussion about whether it is possible consumes exactly the effort that would produce it, and the discussion is more comfortable because nothing can fail during it. This is why some projects are talked about for years.

End the next planning conversation with one action assigned to a person and a date. Small and real beats large and theoretical, because only one of them starts anything.