@Degernase - it's more like, is such a rotten world worth being saved?
Reminds me of an isekai story where a wise ruler of the past remade the law to ensure there is no slavery (and even hard labor as punishment is not called "slavery"), just in case an otherworlder comes by.
@flannan
Well, the "hero" saving a world without really any further motivation other than "it needs doing" has by now already become a trite concept.
Also there's still actual slavery (with no sophistry needed) in this very day and age.