It's irrational to not at least consider all the factors. Utility should be the test of their importance.
Really. Ok, try this for an example.
Let's say, hypothetically, that some research is done and it's found that abolishing all rape crisis and counselling services is the most cost effective option. Societal cohesion doesn't appear to be adversely impacted, overall productivity stays the same, as far as anyone can tell. Turns out that most people manage to deal with it, and for the extra cases that are more problematic, just giving them a few pills to keep them in robot mode works out cheaper than paying for counselling services, etc.
Obviously, in this case the most utilitarian option would be to abolish those services. Should we do this or not?
Bear in mind that you are talking to someone who can easily rememeber when none of these services existed, and society stayed together just fine, with good productivity.
Devious, treacherous, murderous, neanderthal, sub-human of the West.