For a engine powered craft with a screw this indeed a viable concept and several vessels have been made like this.

However for a sailboat you have to content with a widely varying loading pattern due to the tall rig and varying winds. In effect vessels of the first kind are very stationary in their bouyance distribution requirements while sailing vessels are not. The latter need reserve bouyancy to handle gusts and other pitching moments due to being top-heavy (mast + rig).

Typically a crew is too slow to compensate for these pitching variations by repositioning themselves.

Wouter