Necromancy is just recycling.

There’s a reason my morally questionable Wizard’s spell selection skews heavily towards enchantment and necromancy. Lots of delightfully dubious spell options.

As with every other tool it all depends on how it is used. Is enchantment worse than just burning people alive or enslaving their soul after death? Most schools of magic can be used to do some heinous things, and can also be used for good.