According to your logic, team weapons and hand held weapons should not be able to crew or pick up by opponent also.
Not all WWII soldiers know how to use all kinds of weapons and have the proper munition supply. Even soldiers from same faction should not be able to recrew tanks, since they may not have proper training to operate the vehicle.
So this is not a valid argument to support this change.
Wait, guys this is so important:
YOU MEAN A SOLDIER DOESNT KNOW HOW A FREAKING CANNON WORKS? (PUT THE SHELL INSIDE, PULL THE LEVER)
A MORTAR ITS EVEN MORE SIMPLER, DROP THE SHELL INSIDE LET IT FLY AWAY BY ITSELF. BOOM! War 101.
Dont even start me on HMGs...
And wait theres even more, the ammo of a team weapon, is just beside it! Wooah. I mean, who could have though of it! Also, I think you cant put a 120mm shell inside a 82mm mortar...
Seems pretty logic isnt it?