I agree. But blowing the thread or blowing the tank is the same. One less tank in action. 100 kilo HE in an IED on the side of a road takes out the tank. Remember there is a human crew in the steel shell.
In Anti-Tank Warfare never forget the human element.
Except that now, unlike in the Korean War, the tank has a lot more options. Disabling a modern MBT is unlikely to injure the crew, and MBTs don't ever operate alone any more. All that has to happen is that the area is secured and a tank recovery vehicle can retrieve it. Or it can be towed home by another tank - especially in urban warfare against a guerrila type enemy.
Some guerrila warfare experts recommend that the guerrilas NOT attempt to blow the tracks off a modern MBT, because then you just sited a hostile pillbox with some of the best armor known to man as well as some of the best armament in the world *right in your backyard*.