Hey man, I wasnt saying anything about how they would be used. Skeleton labor could make all other labor absolete and possibly everybody could be rich without ever having to do anything. You could hit post-scarcity or something pretty close to that. Necromancy can be used in all sorts of ways. But I'm not here to argue the merit of labor. I'm here to argue against the idea the necromancy is morally bad.
And a Fireball only hits its intended target if the mage makes the moral judgement to use that way. The same way a Necromancer in control of his skeletons could.
I guess there is an argument to be made for harmfull negligence though. I suppose Necromancy is less like fire and more like neuclear energy. Potencially very, very useful but it comes with big risks. It then becomes a process of risk management and a question of wether it is worth the risk.
I would argue that having a bunch of disposable minions is of such strategic and logistical benefit that it will almost always be worth the risk. Just gotta be careful.