Tanks did not have hit points, they are either penetrated and destroyed or immobilized, or they survive. Reacting to a newly seen unit takes some time as units try to spot a unit mving. Also aiming main guns took some time and spotting a single infantriman in the woods would be VERY difficult. Even with todays M1 tanks it would take a few seconds to engage an enemy. In a WW2 tank took much longer.
Tanks are tough.
There were only 3 Jagpanthers in normandy and were an important asset to the axis. In this game heavy tanks blow up like they were made of paper. Artillery did not open fire on a single man 6. Heavy machineguns could only damage very lightly armoured vehicles 7. etc. This list continues on and on and on.