It's censorship resistant. Is anyone stopping them from mining their own transactions? Everything has a cost.
It's even more fundamental than that: censorship resistant means that individual actors can make up their own opinions. If a big group doesn't want to mine ordinals, for whatever reason -- perhaps because they believe it's harmful for the long-term viability of the network -- then this is a way they may band together to express that.
And of course, you can see how, taken to extremes, that strategy could itself produce worse long-term consequences. It's a complicated system with complicated acts.
Everything has a cost.
Well said.