If you have an idea and believe in it but it's getting shot down create a DACI/RFC. This is initially playing chess with yourself to see if it is a good move. Once done (and if the idea survives that without a pivot or abort) you now have a document other team members can comment on. You cam refine etc.

This is good for day to day ideas and innivation. Moonshots probably need something else which I am not sure what to propose. Other than POC with some numbers to get more explore time.