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.