@piggo @lain
Well, Starship is contracted as NASA's moon lander for Artemis III, and also a way to get a lot of the necessary fuel into orbit.
Maybe they have a plan B, but if Starship ends up working to the spec, it will be the cheapest (per kilogram of payload) way to get a lot of stuff into orbit.
Also, during these tests, blowing up is Starship's equivalent of abort(3). Anything goes slightly wrong -> starship blows up so that it doesn't fall as a large chunk in an unexpected place.