When I first heard of WoWS, way back in Feb of 2014 at the WLGNA Season 3 finals, I was excited out of the box because of my love of naval history.
It has been a life long interest and passion. I would wager a great many were first "hooked" by the historical aspect. But had the game not been fun I and many would have faded away a long time ago.
As the game has continued to grow WoWS and WG has celebrated the real-life ships through visits, such as Let's Battle Tours in the past, and now the Anchors Away Tour.
So while history may have been why many came in, I can see how gameplay may have kept folks.
But I still get a kick every time I take out the Dreadnought, the Hood, the Haida, or even just the Fubuki.
The history makes the game just that much enjoyable.