Kind of yeah. If Spencer says that Faustus has tech which can mind control an army, then we have to pretty much accept that he does because it's canon once it's printed on paper. Why can the breathing gun given to Blade kill angels and demons? Because marvel says so. Why do fragments from Supermans own home planet kill him? Because someone in DC said so. You can question or complain or argue about it, but in the end if it makes in in print in a comics then it becomes canon, at least until someone retcons it.