All of the armies underestimated the ability for an airplane to knock out a tank. The air corps just created tank busters. Hurricanes with 40mm cannons, The Il-2, Stuka with 37mm cannons. The upper parts of the tank were weaker. Later, rockets were employed. By the end of the war, German tanks were afraid of moving in the daylight.
By the end of the day on June 6th., 1944 the Germans realized that anything that moved in daylight was dead meat.