Utilitarianism is false, but I think it is a very useful heuristic, where I think it being used (as a heuristic) more often would probably be beneficial at the margins.

There is no canonical way the aggregate utility between persons, and people probably don’t actually have utility functions. And, there are moral laws which should have at the least some weight when weighed against a “but this action seems to have better outcomes overall, on average”, and possibly infinite weight when weighed against such things.

Nevertheless.