Kids want to eat candy all the time. Letting them would be no different than letting them eat dog poop if that’s what they want. We often confuse right and wrong for what feels good and what doesn’t. That’s the deception that allows evil to exist in goodly form. You just have to look a little below the surface. Very often wrong things feels good. Those are the paving stones along the broad road that leads to destruction.
My point exactly. Looking at the bigger picture, as Jesus did, “Love your neighbor as yourself, and ‘your neighbor’ includes the person you least want to include,” we can reach a conclusion that it cannot be a moral obligation to help or to allow a person to do something that is wrong - because sinning hurts that person’s soul and is probably stupid, too - or pragmatically damaging.
We may not be able, realistically, to stop a person from doing something wrong or inadvisable, but we cannot have a moral obligation to facilitate his actions.