Old as Methuselah! Well I agree it's not very realistic. The context of the cold war was important in the planners decision. In the standoff, the Royal Navy's main task was submarine hunting in the north Atlantic. You don't need super-carriers for that.
Agreed. Although it's quite nice to think of 5 large carriers being built by 1980, but it's always interesting to see what the Brass Hats want and what eventually transpires decades later.
that's why we maintain our closest ties w/ the RN, they take care of USSR subs, we take out surface fleet w/ carriers
The RN, and Canadian Navy, for that matter, were concerned almost exclusively with anti-submarine warfare from the 1960s onwards (although obviously the RN had other non-NATO commitments).
In a WW3, alongside the RAF, USN subs and other NATO assets - this would have involved clearing a path for the US carrier groups so they could get at Soviet ships and air bases, in addition to the obvious convoy protection.
Hence why the RN was allowed to become dangerously reliant on aircover provided by the RAF from the UK, and by the USN/USAF further out to sea, during the late 1970s/early 1980s (and why the Nott Review of 1981 called for axing most of the carriers and amphibious force, in favour of nuclear submarines and modern ASW frigates).
The only other commitment to NATO the RN had was keeping the approaches clear of mines and reinforcing Norway in the event of WW3.