For me, it would most likely be yes, despite the fact that it's all simulated and not real.
I never joined the military in my life, and I highly doubt I ever will, not without physical and psychological trauma shoved down my throat against my will. However, what I slightly know about it is that it's heavily organized, even amongst the chaos involved in battle. Unlike those 80's action films where soldiers are portrayed as one-man armies, real-life wars have soldiers working together with other soldiers on their side, unless they try to be one-man armies and get killed as a result.
It's almost the same with team-objective shooters like Counter-Strike and Team Fortress 2. Like real soldiers, teams of players often work best when they combine and coordinate their efforts toward a common objective, whether it's capturing an enemy base or protecting their own base. Unless it's a free-for-all deathmatch, players have to work in teams to survive and win, just like real-life soldiers. Otherwise, they try to become one-man armies, and they'll just get killed.