Again, you're nearly proving my point. However, they are looking to challenge the fantasy worlds that have existed since the action genre existed. If you have the time and bandwidth, check out one of the movies, particularly the high-quality 60MB one. The action has gotten more than a fair share of gamers interested, including myself. Now, if you put that video clip beside, say, a demo of a fast-paced Quake III Arena deathmatch, I guarantee a parent would be more upset with the latter.
Realism is relative.
True, it's relative. Compared to a fast-paced cartoonish game like Q3A, Counterstrike seems very much real. But compare the situations faced in Counterstrike to the same situations in real life. They're still very different. Counterstrike and games like it, most notably Soldier of Fortune, boast realism, but in fact, still aren't very realistic.