This is, actually, an anti-feature for some people. People don't like things they don't like to be effective, because they'd like to be able to argue on that b

This is, actually, an anti-feature for some people. People don't like things they don't like to be effective, because they'd like to be able to argue on that basis as well. "We shouldn't torture people because it is cruel and a violation of their human rights" is a purely moral argument; "We shouldn't torture people because it is cruel and a violation of their human rights, and it isn't even effective at extracting useful information or true confessions, study after study has shown blah blah blah" is a moral argument with an effectiveness chaser thrown in. Even if you don't share the same moral framework as me, I can still possibly persuade you to act in a way I see as moral because acting immorally doesn't gain you anything but wanton cruelty. People love to do this for all sorts of arguments, from taxes to environmental or fiscal policies to their monopoly house rules. Granted, most of the time people also just pull their effectiveness claims out of their ass, but it is a very effective rhetorical technique.