I can't see how "the market will decide" can be the right viewpoint here, though I do obviously see why people take that point of view. The reason I can't stop at that is it has a very obvious reductio ad absurdum: every single day, it is rational for 99% of the userbase to form consensus on deleting the other 1%'s coins. And yet, every day, it does not happen. So the argument cannot be about first-order rational economic incentive, it must be both about second-order thinking (how does such a decision affect bitcoin's *future* value) and plausibility (why is it more ok to delete these coins over here and not those over there). From that second-order thinking point of view, holding to censorship resistance (because it's not bitcoin as we define it if it doesn't have that property) is rational.