Broadly, consequentialism requires us to ignore many of the consequences of choosing consequentialism. And since that is what matters in consequentialism it is to that exact degree self-refuting. Other ethical systems like Deontology and Virtue Ethics are not self-refuting and thus should be preferred to the degree we can’t prove similar fatal weaknesses. (Virtue Ethics is the most flexible system to consider, as you can simply include other systems as virtues! Considering the consequences is virtuous, just not the only virtue! Coming up with broadly applicable rules that you follow even when they aren’t what you most prefer is a combination of honor and duty, both virtues.)
Broadly, consequentialism requires us to ignore many of the consequences of choosing consequentialism. And since that is what matters in consequentialism it is to that exact degree self-refuting. Other ethical systems like Deontology and Virtue Ethics are not self-refuting and thus should be preferred to the degree we can’t prove similar fatal weaknesses. (Virtue Ethics is the most flexible system to consider, as you can simply include other systems as virtues! Considering the consequences is virtuous, just not the only virtue! Coming up with broadly applicable rules that you follow even when they aren’t what you most prefer is a combination of honor and duty, both virtues.)