Why because driving a T-34/76 onto a enemy field or town with all the field ack shooting at you doesn't kill you or your turret as quickly as a lone M8 shooting 1 37mm round at a time at a T-34/85. No way 5 hits from a 37mm should be able to do that. That's why .
While northern and eastern flanks had been heavily engaged, the northeastern section had been rather quiet. The only excitement there had been was when an M8 armored car from "E" Troop destroyed a Tiger tank. The armored car had been in a concealed position at right angles to run along a trail in front of the MLR. As the tank passed the armored car, the M8 slipped out of position and started up the trail behind the Tiger, accelerating in an attempt to close. At the same moment the German tank commander saw the M8, and started traversing his gun to bear on the armored car. It was a race between the Americans who were attempting to close so that their puny 37-mm would be effective in the Tiger’s "Achilles heel" (its thin rear armor), and the Germans who were desperately striving to bring their "88" to bear … Suddenly, the M8 had closed to 25 yards, and quickly pumped in 3 rounds… the lumbering Tiger stopped, shuddered; there was a muffled explosion, followed by flames which bellowed out of the turret and engine ports, after which the armored car returned to its position.