Marcel,
I get what you are saying, and again the difficulty lies in the limitations on what we can make observable. Steve is also correct to a degree and his fascination with (idealized, original spatial configuration) spherical representation of reality is not inconsistent with your paradigm.
Where I think it can come together is where we imagine energy condensing to a matter state which exhibits physical properties such that the task is to reach consensus on definition of qualitative, ontological terms that might provide a quantitative model for "why" induction of the magnetic moment occurs. And thus arive at a general definition rather than an experimental definition of electric charge. What IS it? ... energy of course, and at greater density than the same continuously connected energy that exhibits the characteristics primarily of magnetism.
How might we imagine the behavior of energy gravitationally bound (hypothetical for sake of ideal modeling) in a self-limiting free rest mass? Given the paradigm of an isolate quantity forming a FRM condensate, let's propose that the primary force effects are manifest as the conjugates of the tendency of energy to decelerate inwardly to concentrate energy quantity and conserve space in an energy super-saturate universe --- and the tendency of energy to accelerate towards light velocity outwardly to fill space.
We now com to the expediency provisional by both SR and GR; that if energy accelerates outwardly to the relativistic limit, then it is the rate of time that is existant at light velocity and the simply connected energy across a range of density variation in the FRM need not, nor cannot, be in any state of motion itself at the gravitational limit boundary of some empirically derived universal minimum density.
So what's Time got to do with it at the other end of density variation in the condensate FRM? Would not the inverse be true? ... that the rate of time slows towards nil at some empirical upper density limit as energy "stacks up on itself" exponentially under the ontology of gravitational deceleration. (i.e.) Time doesn't 'stop' at light velocity, only the observation of it because light velocity is the limit to which time can go.
So at the electron's center there might be an inelastic density core outward of which is a lower density spherical measurement boundary we associate with electrical characteristics. BUT that doesn't mean that the condensate doesn't continue to use up a tiny bit of the total mass quantity of energy interior to the measurement boundary of inelastic density and the upper density limit might approach a density where Time physically stops. Hence: not even physical rotation (motion) is necessary for there be a difference in state of motion to produce induction!
Best Wishes, jrc