I’ll reply to this later in depth. For now, you are correct in that “Perfect is the enemy of good enough”. However, other than tanks, the US had superiority in everything else top to bottom.
Quantity by itself does not suffice.
By 1043 the US had superior carrier-based planes to the Japanese. The Corsair and Hellcat were nearly 80 mph faster and more heavily armed and armored.
Even in 1040-1941 a P-40 could compete with a zero if used right.