To the average user this "freedom" you talk about means absolutely nothing. People just want something that's simple and works. They don't want to know the code of the OS. They don't want to modify it. They don't want to have to stop using software they like because Linux can't run it. Remember the golden rule: KISS (keep it simple stupid).
I have nothing against Linux/Ubuntu or whatever. I would gladly welcome another OS to the market. BUT considering the fact that you have to jump through hoops to get a lot of stuff to work and that some things may not work at all is a major put off. No amount "freedom" garbage talk will change that.
For BIS to deliver their own OS would just put a lot of people off from buying it. It would be a disaster.
I think the herb has influenced you a little too much.And as I already said: The real committed BIS-gamer doesn't have the time to do other games. But if not: He can do like he always did: Buy and boot Microsoft ...
I have been playing BIS games since 2001. I still play OFP and ArmA, still make missions for them. I play BIS games more than others.
I also play other games so to say that a BIS committed gamer doesn't have time to play other games is completely ridiculous.
People tend not to play games because of the developer who made them, yes it will play a role but a very small one.
For example, I like military games that have a sense of realism. That is why I play Close Combat, OFP, ArmA, ArmA 2, Wars in America, Panzer General, Allied General, The Operational Art of War, Combat Mission Shock Force etc.
All good challenging games with a degree of realism and accuracy (not all are FPS). As much as I like ArmA 2 I would not play BIS games only. I am interested in military stuff which is why I play OFP, ArmA and ArmA 2. Carrier Command is being developed, at least partly, by BIS, however, I will not play it as I am not interested in science fiction.
I guarantee that even the most ardent BIS fanboy would not just play BIS games. I bet there are only a handful, if any, that do.
If BIS followed your advice and released an OS for ArmA it would mean that people could not play the other games that they like. Computers require a lot of maintenance and fiddling about with as it is. People don't want to bother with a dual boot for one game.
It would be a waste of BIS stretched resources.