Right, because maia just went around casting spells in orcish a lot
Gandalf is not the usual wizard (but then there are only five). But once more, where are all these orcish spellcasters ? With all the orcs that we see, and all these armies, there is not a single one of them, not the hint that there could be one apart from Gandalf who is the only wizard to have made a study of such "lesser" things.
"Doubtless the Orcs despoiled them, but feared to keep the knives, knowing them for what they are: work of Westernesse, wound about with spells for the bane of Mordor."
And again, no proof that these can be taught to anyone. And forging is again another matter, look at what dwarves did for example, and of course, we see entire regiments of dwarven spellcasters.
See for example: "
Magic in Middle-earth was explained as an innate ability set of the Ainur and the Firstborn, to the exclusion of other peoples. Regardless, The Silmarillion and The Lord of the Rings both contain descriptions of special items and weapons that are said to have been crafted by Men and Dwarves, such as the dagger wielded by Merry which stabbed the Witch-king and Angrist."
They were angelic and their power ranged from not very powerful to Vala(archangel).
Yes, angelic, "divine", in essence not mortal and therefore not PCs.
They can have it, they just haven't been taught. There nothing to indicate that they are only for NPCs.
And yet, factually, they are, in all the books, and you have absolutely zero proof that they can be taught. It's rather the contrary, have a look at letter 155 and things like: "At the end of the draft noted as Letter 155, he wrote "a difference between the use of 'magic' in this story [The Lord of the Rings] is that it is not to be come by by 'lore' or spells; but it is an inherent power not possessed or attainable by Men as such."
Mentions are all over the place about the fact that not everyone can do everything.