I agree that the original shared vision is crucial, but I don't see why they can't come up with that after acceptance.
If a team knows how to go quickly from idea or concept, to market definition, to customer discovery, to validation very quickly it's not a problem. Most people don't even get out of the building to talk to customers routinely. They build something and see what sticks.
I would rather take a team with no idea but were really good at customer development over a team with a concrete idea but no customer development experience. The no-idea team can quickly figure out if an idea solves a problem for a big enough market and if they are willing to pay it.
If a team knows how to go quickly from idea or concept, to market definition, to customer discovery, to validation very quickly it's not a problem. Most people don't even get out of the building to talk to customers routinely. They build something and see what sticks.
I would rather take a team with no idea but were really good at customer development over a team with a concrete idea but no customer development experience. The no-idea team can quickly figure out if an idea solves a problem for a big enough market and if they are willing to pay it.