If you have demand (aka, product market fit) the rest is are optimization problems. When you look at someone like Musk who is in multiple businesses, he's essentially the head of a private equity firm that manages products. He bets that certain unsolved problems are composed of solved ones, and where they aren't, it's a hack or an minor breakthrough away. Every breakthrough has non-linear effects, so it's a smart way to take risks.
Start with a counterfactual with nobody in the market, run the numbers on what it would look like if it were true, and then manage the demand to fullfill it. Politicians are similar. They manage donors off voters, where their real promises are to the donors, and the story and hope is what they sell to voters. Makers make, but managers manage, and I don't think most of us on the maker side really have an apprehension of what managing actually is.