I'm not really sure if keeping a strict schedule has any real relevance here, outside maybe PR and politics. Starships will drop the cost to other bodies in the same way Falcon dropped the cost to orbit. Why would anyone want to invest in a technology and a project that will be obsolete by the time it's implemented?
That is assuming Starship succeeds. Elon's track record hasn't exactly been stellar as of late.
Wasn't Elon kind of treated like a child to be distracted and kept at arms length at Spacex? He is apparently really really good at fundraising, marketing and publicity (well he used to be anyways). But the stories that have come out of Tesla, and Paypal and SpaceX seem to me like the people actually running the show have tried to distract him as much as possible, and any of his actual decisions have been awful. I recall a story from PayPal's early days where he wanted to swap the servers to windows, and then he got canned as the CEO.