The discussion that has been going on is less about that and more of the idea that you either have magical proficiency or you don’t, usually in connection with having familial background.
The idea that magic is something you either have or don’t have is absurd. Humans, animals, rocks, planets, stars, god, it is all the same. We are all made of the same energy presenting itself in alternate forms but at its core it is all the exact same thing and it is this energy that connects everything that is what we call magic. So, to say that magic is an energy separate from human nature is absurd. Magic energy is human energy, it is the energy of every atom and sun and ocean and bacteria, everything in existence is innately magical. Witchcraft is just a process through which that innate nature is grasped and used consciously.
Magic, much like creativity, is something we are all born with. Some may have more of a talent for various forms of it but it’s still there and if we cultivate it we learn to use our creative strengths. This argument is like a painter saying an engineer has no innate creativity. It may be a different sort of creativity, a logical, mechanical, problem solving creativity instead of visual creativity but there is still an immense creative drive and expression within engineering.
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*gives intrepidcrow honey cookies*