Why a larger original Invincible made more sense than stretching it

Would a larger Invincible hull have made the proposed 80-foot extension more viable?

A larger original design would have made the extension unnecessary by providing substantially more length, beam, displacement, and flexible internal space from the start.

Starting with a larger Invincible design would have reduced or removed the later need for an 80-foot extension. The comparison uses a displacement increase from roughly 22,000 to 28,000 tons to illustrate the scale of the larger option. Extra length and beam would have provided more volume from the outset. A flexible space below the hangar, reached by a lift, is also recalled tentatively. These are outline recollections of design options, rather than a dimensional calculation proving how much length a given displacement increase would add.