Before I started my basement finish project ten years ago I coated all the poured foundation walls and floor with two coats of UGL Drylok. I have never had a problem with moisture and we have 9' foot ceilings and a high water table. I agree with your father. I plan on addding carpet/ pad directly over floor with some slate tile and engineered hardwood flooring glued directly to the floor. The whole idea is to create the largest space possible. Walls, dropped ceilings, sub-floors, etc. are just subtracting from that concept.