User blog comment:Iam69god/Why is "Lost magic" lost?/@comment-29693708-20160908224005/@comment-7418318-20160909120609

Nice point about it being forbidden.

Some extremists might well consider healing magic to be "unnatural" and playing with life and death. We know for a fact that reviving the dead in any form or shape is forbidden, so preventing a "lethal" wound from killing someone might already go against the natural order of things in some people's opinion.

Hell even in our real world there are people who would rather die than get an operation or taking medicine that was derifed from chemistry rather than herbalism. So it's not too far fetched to imagine a cult or sects going on a crusade against healing magic practitioners.

Then there's also the matter of secrecy. Healing magic seems like a very noble thing, but if you use it to keep an evil tyrant's army in battle-shape it becomes something bad. And if there are only few healers you can charge a lot of money for your sevices.

Both are good reasons to keep the magic to yourself and a small circle of people you can trust to keep the secret like family, clan, guild or maybe cult. Of course few people knowing the secret means that the chances of the knowledge being lost are higher.

The same of course holds true for any kind of rare magic, not just healing. If you have the monopoly you'll want to keep it, but that runs the danger that if the few who have it are lost, the knowledge is lost with them.