Yeah, I know, but players who would play this game will know exactly what they want, and they know this game is one of the few that can offer it. I would prefer to have 300 players who play seriously than 1 million people who just want to go kill and troll.
It's all about target market, I mean, many people who try PR at first get discouraged because instead of reading the manual or wanting to learn how to play, they just go in the game, ask questions that are in the manual, annoy people, choose whichever kit, steal assets, and wander alone, so in the end they don't understand anything and quit. If the devs want to have a million base members they are going to have to make it simple for everyone (that's why CoD is popular, because it's for people who want to kill fast and anybody can play it).
If it was for me, I would make the game as realistic as possible, so it filters out the "childish" behavior as you mentioned plus it would be a great experience for players who would want to play it seriously. I would love to immerse myself in the game being all like "**** me, I'm reliving WWII". That's what WWIIOL and IL-2 1946 achieve to do.