Most likely the first few dozen Starships will not be re-launched in any short time. Although, the engines from any that land could be bolted to a new hull and re-used, after a week or two of re-work. There is simply zero plausibility of the current tile system offering any sort of quick turn-around.

But that doesn't matter. Even without any Starship re-usability (aside from Superheavy), you still come out far, far ahead of any conceivable evolution of SLS.