Or because they are really
Hungry! ( Ba dum tsch dont ban me plz! <3)
COH is a lovely game. It have so many unique things that make it speciell! For example instead of every singel man have a lifebar. The whole squad have one and dies one after another depending on it! This ofc result in close combat where people dont seem to know how to aim ! And sometimes even if they have a free shot the enemy doesent die because they are too good or the attacker is to weak. This is ofc part of the COH gameplay and should NEVER been taken away. But it could work as an abilety?
Flanking!Example: We got 2 squads of landsers. We call them Adam and Eve. Adam and Eve are out to take a checkpoint. Suddenly they walk straight into an American Mg team! Eve is the one too be target. Adam somehow did make it out and are now running a long route behind obstacles and dead cows and other epic map enviroment to get on the side of the mg outside of its fire view.
Its now the German player activate Flanking!
This do that every unit for like 30-20 sec for an amount of ammu gets a great bonus buff against enemys that AREN´T firing on them.
So what happens it that Eve is lying out there in the shitstorm crying over why they have to be Eve in a global conflict like this. The mg are focusing on Eve and not ADAM. This make that Adam who now is on the right of the mg gets the attack bonus and now flank the unit and gets a tremendous attack agains it because they arent the one getting fire on!
In short. Flanking! makes infantry better against targets that arent firing on them for a little period! This in other hand can probaly be missued, making you better in battle so long the enemy arent firing on you. But its only active in like I said. 20-30 secs. What do you say? :D

My English is kind of useless. But that because Iam swedish Wooohoooj! ;3