I don't believe a lot of mma ground stuff would be as effective in a no rules environment. Its harder to choke me out if I can bite the arm thats doing it, and as unsavory as biting someone is I would rather do so than get choked out in a real fight. If someone put me in guard and I wanted out quickly, It's a position that leaves the old jewels fairly exposed; an eye poke or throat attack would be pretty doable also.
That said, mma is not just those things. The striking and being used to having someone throw strikes at you is pretty realistic. Having to worry about the possibility of ground or staying aware of multiple weapons, all good stuff. For me, I use shoulder, wrist and elbow locks at work on a fairly regular basis, just from a standing position. These aren't exclusive to mma, but the way I train them when training mma is more realistic than any manner in which I had previously trained them. (Though where I am at, we don't ignore street situations by exclusively training for the 'rules')
Is it the most realistic? Who knows? I don't really care, It serves a purpose for me and I enjoy it, and that is really the important thing.
That said, mma is not just those things. The striking and being used to having someone throw strikes at you is pretty realistic. Having to worry about the possibility of ground or staying aware of multiple weapons, all good stuff. For me, I use shoulder, wrist and elbow locks at work on a fairly regular basis, just from a standing position. These aren't exclusive to mma, but the way I train them when training mma is more realistic than any manner in which I had previously trained them. (Though where I am at, we don't ignore street situations by exclusively training for the 'rules')
Is it the most realistic? Who knows? I don't really care, It serves a purpose for me and I enjoy it, and that is really the important thing.