Good post, though I don't normally see people saying 'you're a necromancer, you cannot practice Reiki' or whatever. True, you should follow what you feel is right and what interests you. Sometimes labels can be a good things, but only when you choose said label. There really isn't a rule saying what you can or can't practice, besides The Wiccan Rede, but that's not universal, just for Wiccans, and even then some define 'harm' in different ways.
Now, I have seen people saying yes or no to certain studies for various reasons, primarily because they don't exist or are contradictory terms. Christian Wicca comes to mind. I have no problem if you choose to be a Christian Wiccan, but it is a contradiction so I see why people get upset. It's the old saying 'have your cake and eat it too' Wicca can be rather flexible, Christianity not so much. But if you're happy whatever.