As a founder, you have to sell. It is not to your customer but to every stakeholder including your team. You cannot expect them to understand everything from inception, nor will they read your mission, and vision statements stuck on the company’s wall.
You have to act, show, and lead it all from the front. This cannot be repealed by an HR or some head of XYZ. As a founder, it is you.
Many founders like to code, sit alone to think or many others run solely after their investors for subsequent funding rounds.
What the founder should do instead is: communicate directly and honestly. I would say over-communicate and talk through the team in thick and thin. Those who are scared will leave, they don’t qualify for your mercenary army.