There are concepts in the game that would be unlikely in a simulation game but are common in MMO's. Think of fast travel, instance dungeons and more.
One of Eve Online's strengths is that it conforms gameplay to the MMO setting. That is one of the main driving factors in it's design and allows for example for Time dilation, huge battles and continuous universe and economy that it is famous for.
This is different from for example World of Warcraft, in my view that is a RPG first MMO second. That is one of the reasons it has sharding and smaller pvp battles.
The monolithic world needs to be big to spread everyone out. And it's easier to create ten thousand "systems" than it would be to create an immersive terrestrial world with a similar scale. Each EVE system is just a bunch of objects floating in a 3D space that you travel between.
And of course tide played a major role, with the Germans during the Battle of Jutland racing to get past a sand bang to avoid being stuck at open sea & be mauled even more by the British.