I know that these game modes are not a path of Insurgency, but...
Right now Insurgency is recognized as a hardcore shooter for "real sweaty man." I'll be honest, I avoided Insurgency for some time because I thought that this game is too hardcore and boring.
Gun Game and Deathmatch are the great way to warm up and practice against other players. Since community servers exist, why not? More game modes - more people. This game has an awesome community, but there are so many afraid of trying Insurgency just because they think that this game is something like Arma or Squad with boring gameplay. Add casual game modes, show players that this game is fun. Let them try.