Even if Starship completely fails, SLS is a pointless and ludicrously expensive dead end. Terminating it is the only logical thing to do.
Starship in contrast has a variety of meaningful objectives. Even if Starship only achieves proving that cryogenic fuel transfer in LEO is possible that's a valuable mission goal in and of itself.
If you really think "the whole moon thing is pointless" NASA is pointless.
They are great at pretending to deliver value, but there's no "there" there.
There's more to NASA than Artemis! NASA's robotic spaceflight programs generate extremely high science return at relatively low cost. Missions like Psyche, Europa Clipper, and Dragonfly are humanity's real explorers.
And their aeronautics work is valuable as well. Low-boom, etc.
IMO the Blue Origin hate was overhyped. They're clearly the only ones who know what they're doing. NASA and SpaceX both are way in over their heads.