Then don't get it snared? That basically the same shit for every vehicle in the game minus churchill that are already slow as shit that it doesn´t make any difference.
Good luck 3-shotting that rusky kamikaze at full speed, only a mine or a pfaust of a squad right in front of the KT can catch it in time.
And there is smoke to support the ramming maneuver and make it 100% effective.
Added for completition
The threshold is a straight up 75%. That means the threshold for engine damage on the Tiger II is already much higher than other tanks because it has 1280 hitpoints. Not even a Satchel will cause engine damage from full health. It needs to lose 320 hitpoints before it takes engine damage (compared to 160 for medium tanks for example).
Since its true that a 100% wont get engine damage, its not that hipotetical to get it snared with ram.
If the KT is being used as spearhead, after 2 shots of an SU85 (that will mostly pen) a KT is vulnerable to a ram snare.
Both, su85 and T34 are faster than KT, one to kite and the other to flank.
I will admit that such maneuver is worthy the benefit though