Yeah, consoles are always under scrutiny by Microsoft and Sony.
Even official patches need to be approved before they can be shipped on consoles (This is why you sometimes see delays between PC and Console updates).
So while players and developers might wish to enable mod support on consoles, it's all down to the console manufacturer's whim if such a thing can happen. Which, as such things doesn't earn them money, they have little reason to change their minds about mod support.