Why can't EM and nuclear forces be modeled as spatial curvature?

[Terdbergler]

Why can't EM attraction/repulsion be modeled as spatial curvature the way gravity can be?
And for that matter, why can't the strong and weak nuclear forces be modeled that way either? Or can they?

 

[mfb]

There are two types of electric charges, and it is even more complicated for the weak and strong interaction. And you cannot reproduce the observed quantum effects with such a classical model. A classical approach to weak and strong interaction does not work at all.