The Crusaders are scared of the water because they know if they uncover the Mega Ludex Gateway/thing underwater will send all the Ludex Watchers at them and bring the wrath of the Ludex

And also I realized many of the ludex AI are defending things that defend or overseer something. Nullifiers, Towers, Eyes, Watchers, Rangers sorta, and they have 2 Stationary Facilities, Ludex Gateways and Ludex Terminals. Maybe Ludex Guardians too.

But the Crusaders all almost all just attackers. Only defense things are the Crusader Honor Guard, Crusader Bulwark and the Crusader Nuclear Silos.

And something I noticed is that the Ludex Guardian, only APPEAR when the Ludex avater gets SUMMONED, the Crusader Honor Guard is always guarding the Far Pope. I believe the Ludex avatar comes from the Mega Ludex Gateway/Water and the Guardians appear with the ludex avatar

I feel like whats going on with the Ludex and the water is that there is a Mega Ludex Gateway or something like a Gateway and those eyes and watchers are for overseeing the thing that will come from the water Gateway

and those Observer ludex are actually very important as they oversee the player because they are the eyes of the Ludex Avatar. I mean they are the smallest eyes, the most mobile eyes, and they always follow you and sometimes prioritize you over enemies. Their shape is not like anyother eye and is not just a sphere. The other eyes are stationary and don't move around and the Eyes can also take down enemies without looking at them so why would the Eyes be the Eyes of the Avatar. The Watchers I don't think they would be the Eyes of the Avatar because they mostly are in a defending role and less of a watching role.