As there are no stupid questions let me ask at least a naive one:
A schooner vis comes with two sails and two rudders and one or two outboards.
Given that in enough wind one can turn with the sails only and in light wind one can turn well using two outboards, could one do without the rudder function of the boards and keep them fixed?

Upwind, Easy Rigged BD requires 5-10 degree rotation of the aft rudder. A schooner would solve that with the differential in the sails. Right?

I imagine that in a shunt one could veer off with the sails, drop the outboards for braking further and then veer up in the other direction while the sails pick up the new heading and then the outboards are retracted.

Then, of course, there is the Seabbatical rudder/prop combination.