I think it's hard to say there isn't demand since it was so ridiculously expensive prior to SpaceX. Getting things into orbit at this price point is quite a new thing. In a recent post on this blog, he talked about how before SpaceX, even basic things headed into orbit had to be redesigned entirely to satisfy grueling mass requirements. I wouldn't be surprised if it takes a few more years for people to realize that they're not subject to those restrictions anymore and to fully understand the import of that. (Indeed, the prior post I mentioned is called "Starship is Still Not Understood.)