If this is true, then tell me what is the source of the power that brings about the desired results. This is not a natural process.
Rowling makes it clear that in her 'version of the world' as it were, there are those who are born with an ability to use magic and those who are not. It's an innate power and and it's left at that.
Rowling has created her own fantasy world, which is not the same as ours... which makes your comment on its 'naturalness' somewhat redundant. It is a natural process in the world Rowling has created. It's a purely innate natural power which requires no intervention by any other forces.