First off, even I think this is kind of silly. But recovering damaged or disabled vehicles is a big part of modern warfare. Where many many vehicles take damage that is repairable but do to battle causes them to be abandon. If you get kicked off a battle field you not only loose the battle but all your damaged repairable equipment. And it would be nice in game to drag that disabled half track somewhere either safer or more useful. Or that tank out of line of fire.
Lord knows that amount of training I had to go threw on how to recover a vehicle under fire. With tow cables ready to go to drag a disabled vehicle out of line of fire. Of course, actually getting out under armor and hooking up cables would be a suck job.
Guess I was thinking hay, we got the ability to tow guns, why not tanks too.