Yes, of course. I mean, the same way all solvers are used in FEM, they don't actually come with FreeCAD, the user has to get them separately.
Of course I know that, but still, it doesn't hurt if the FEM workbench is extended a bit to consider simulations that aren't strictly FEM.... even if the implementation can be done similar to existing FEM solvers, this is not FEM.
I mentioned this earlier, a separate "Dynamics Workbench" could be created as well, maybe based on the code of FEM.