[Mobhack]

The recent fighting in the Ukraine shows what happens to light APC caught in an artillery concentration. And these modern APC are not open-topped as WW2 ones tended to be. Even T-72 are disassembled. The survivability of armoured vehicles to some extent is their ability to move out of a falling concentration, rather than stick about and get attrited.

If you think arty is too good, then you can reduce the arty effectiveness in the preferences screen.