Except they find a way to, like one scientist managed it with witches' power. A female can only become a witch when being near a dying one and the powers get weaker with each passing. Not everyone has the potential to become a witch, but I don't know how it's determined...
What I mean to say is, one scientist found a way to copy witches' power. He calls it "Para-Magic", though it's weaker than actual mgic from a witch. So, what I'm trying to say is, they could copy your powers too, Jaz, even if it is weaker.