I usually don't resort to RL examples, but:
Look at it from a real life stance:
How does one go to war? You need weapons. You need transportation. You need armor. You need security.
So how do you get all that?
You build weapons (which is possible in the game - weapon construction).
You build tanks and aircraft (which is possible in the game - ship and vehicle construction).
You construct armor (which is possible in the game - item construction).
You bring along other unit members (which is possible in the game - NPC hiring).
Now, how do you even get those things built and moved?
You need metals and other materials. Where do you get them from? From mother nature (which is possible in the game - Raw Material mining).
How do you know where to find them? By using equipment to find it (which is possible in the game - Prospecting).
Then look at other examples. You have police raids and quick spec ops raids (which is possible in the game - arrest/execute).
That's just a small part of it.
So as you see, there is more to anything than just combat. You can't fight without weapons or ships. You can't have weapons or ships if they're not built. You can't build them if you don't have the crew to build them or the materials. You can't have the materials if don't have mines to get the materials from. You can't get the mines if there are no deposits available. You can't know if there are deposits available if you have not prospected. You can't prospect a slab if you don't have a vehicle to prospect with.
That's like one big circle that shows you that really, combat is something that everyone is preparing for, as others here have said. If combat were out right now, and you tried right now to attack someone, all you would be doing is walking needlessly towards your own death, because they are moderately prepared, whereas you are not. Stay in the game, learn the mechanics, and get your security up as much as possible. Once you have done that, then you will realize that combat really is not as appealing as you are currently making it out to be.
Because (and this may sound ironic since the game exists for over 10 years now) as it is, it is still too early to bring out combat. We need more time and we need more things prior to combat to be implemented.