During the many centuries that magic, here on this planet, was presumed to have worked, there were at least as many theories as to how magic worked as there were cultures and religions.
Editors of open anthologies actively seek submissions from all comers, established and unknown. They are willing to read whatever the tide washes up at their feet.
I do have a small collection of traditional SF ideas which I've never been able to sell. I'm known as a fantasy writer and neither my agent nor my editors want to risk my brand by jumping genre.
I'm a writer first and an editor second... or maybe third or even fourth. Successful editing requires a very specific set of skills, and I don't claim to have all of them at my command.
I'm one of those writers who, when writing, believes she's god-and that she hasn't bestowed free will on any of her characters. In that sense there are no surprises in any of my books.
If you write, one of the questions you're always trying to answer is, Where do you get your ideas? And, if you write, you know how pointless a question this is and how difficult it is to answer.
Neophyte writers tend to believe that there is something magical about ideas and that if they can just get a hold of a good one, then their futures are ensured.