Tanks are famously dangerous to be anywhere other than directly in front of. The angular front blind spot isn't terrible, but from the front corners on back they're massive hazards to the point where infantry gets trained on it so they don't get run over.

Speaking or fun over, whoever made that illustration should be run over by a tank. Fix the size of the goddamn kid or fix the distance and change the size of the kid. Having both variables move serves to only add confusion and annoyance.