There are some moral issues where opponents or supporters use pragmatic arguments to support their moral standpoint. For example, people might say promiscuity is immoral because of the risk of diseases; or that abortion is morally permissible because of the inconvenience of unwanted children, or that it is immoral because of the risk of damage to the body.
My question is this: to what extent are pragmatic arguments relevant in discussions of morality? That promiscuity brings with it the risk of disease is an extrinsic problem, not an intrinsic one - in a world without STDs, it would no longer be relevant. The problem of unwanted children being an economic burden is also only relevant as long as it really is an economic burden - a rich woman with an unwanted child could easily hire a nanny and build some extra rooms onto her house, and the problem disappears. In both cases, the problem that disappears under the right circumstances can't really be a moral problem, can it?
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