Right, but when TEACHING, you need to make sure that you TEACH that alchemy is not legitimate.
Although knowing your level of scientific knowledge, I will leave open the possibility that you very well might believe alchemy is just another way of doing chemistry.
I'll repeat myself one last time since you didn't seem to know how to read what I stated and it address your quote.
There is no disservice in letting students know what alchemy is and why people may think it is illegitimate or legitimate (do you get it now? We agree here!). It is a disservice keeping students from learning what it is. Children not taught of such things find out about them and don’t know what to do when confronted by them. It’s no wonder why kids get into witchcraft when they don’t learn what it is about in school but from their peers.