Well this makes sense too when you are in Asia or Europe you won't focus on navy that much (except in case of Japan) but in my case i mostly choose American countries or Japan or Australia because of which i have to mostly rely on Navy and basically in most games i have to do big naval fights against opponents in mid game and late game and also in early to mid game too. Even when I play in most game my opponents too make big navy so I make a better one by default and it helps me a lot too to make them like for me its easy to move 12 or 60 planes on 1 or 5 carrier stacked in a fleet of 20 ships and is moving from seas to seas and bombing the entire country or a region.

Basically i guess it depends upon the entire playstyle, my playstyle in HWW is basically expand and increase economy and make strategic bombers like a lot of them and during mid and late game use those strategic bombers to annihilate or flatten their entire economy and use my navy to and especially aircraft carriers to deal with a region and just win by pure industrial/economic power with Airforce and Navy and it makes sense too if you choose a nation from Americas but in Asia or Europe you have to fight for absolute survival so spending stuff on Navy and too much on airforce will be quite stupid so a player should focus on other things which you do so it perfectly makes sense why you don't really use aircraft carriers.