Thing is , you cannot build any thing today like ww2 levels .
They could make 10,000 plane of one type or cruisers after cruisers but they required those vast amounts of naval dive bombers to be effective or like germans made many stukas , numbering well over thousand because they tried some precision bombing thing with stukas.
The plane was the guidance system then plus stukas acted a today's attack helicopter also.
Today everything is so complex that it requires more cost and in the end remember that if royal navy could build 1000 naval ships ,then it was only possible because they had british empire and it's large resources .
