And that is an advantage of traditional moral systems -- because they have been around for so long, they have had opportunities to be tried and tested in various ways. It won't give adherents a long-term view, but it can be a similar effect. Think of it as, "I don't have to think out the consequences of this because other people have thought through similar problems over a thousand years, and came up with a rule that says I should do X." One would be foolish to totally disregard traditional morality simply because of it's occasional clash with the modern world. It would be like disregarding a "traditional" gene made by "stupid blind arbitrary evolution" because we think we have a better one made by a smarter system -- it might be a good idea to compare anyways.