You're saying that under the assumption that they are all frontal armor shots. Driving straight in to an area where you suspect there is an ATG is never advisable. By the time the AT gun takes the 1st shot and reveals itself you won't be on the outer limits of its range arc, so if you were traveling fast and have to slow down and start accelerating backwards, there is a chance you might take 3 hits that way. So instead of reversing out you could try and keep your momentum going and get behind the ATG before it can take the 3rd shot. Well that works if the ATG is completely undefended, if there is any faust or Shrek unit nearby you just drove right at it...dead.
You're saying that like it's a bad thing. Driving with a "delicate vehicle" blindly into its intended hardcounter and getting punished for it sounds perfectly okay.
It doesn't matter if your light/medium tanks get shot in the front or back by paks - the damage is the same and deflection chance is totally negligible. Driving backwards is also the same speed as forward.
As you noticed, tank combat in general is much more deadlier than in CoH1, with long range AT and very squadwipe-y AI. You either like it or not.