Oh, I'm never going to argue that we can't use them however we want! I use sorcery on characters who have no hint of magic on them. I don't believe that the Legacy Devs had planned on locking them to specific origins. I will likely use Force of Will on many different characters, not just Mutants, too.
I was just pointing out, that based on the options we were given, that was probably how the different origin pools were mapped out. (And of course, there's nothing that binds us to the Legacy team's intentions anyways...)
🙂