Why a flight deck cantilevered over gun turrets is troublesome

Could a hybrid carrier simply cantilever its flight deck over the remaining gun turrets?

It is possible to imagine, but the arrangement is mechanically complicated and likely to create more operating problems than it solves.

The suggestion tries to preserve heavy guns while recovering aviation deck area. A deck above the battery must leave room for gun elevation and withstand or avoid the effects of firing. Supports, movable sections, and blast clearance would complicate the ship's structure and routine flight operations. A later British battlecarrier proposal used retractable deck extensions, proving that designers could draw such systems at the cost of cramped and awkward arrangements. Combining two space-hungry weapons systems usually produces a less coherent ship.