How is it not ? Literally the whole pitch was to build realistic ships or recreate them (iowa,etc) or go crazy.
Go to their site, very little is mentioned about simulated campaigns and it's literally mostly about building.
you can "hard disagree" but the release trailers, sites and the game itself disagrees with you.
Not calling it a ship building game or ship building strategy game(campaign) would be disingenuous and a lie.
This game at its core is a ship building game and it was envisioned.
They are doing fine, add more hulls and options in the building area. Polish that and they should be fine, I get that you want some sort of in depth total war type campaign. But let's be honest, that isn't going to happen.
Although I'd love for it to get to that level