Formal frameworks considered in isolation can’t be wrong. Still, they often come with some claims like “framework F formalizes some intuitive (desirable?) property or specifies the right way to do some X and therefore should be used in such-and-such real-world situations”. These can be disputed and I expect that when somebody claims like “{Bayesianism, utilitarianism, classical logic, etc} is wrong”, that’s what they mean.
Formal frameworks considered in isolation can’t be wrong. Still, they often come with some claims like “framework F formalizes some intuitive (desirable?) property or specifies the right way to do some X and therefore should be used in such-and-such real-world situations”. These can be disputed and I expect that when somebody claims like “{Bayesianism, utilitarianism, classical logic, etc} is wrong”, that’s what they mean.