[Little Ray]

Strangely enough the Army tried to adopt the Dauntless as the A-24, but found that dedicated dive bombers were too vulnerable and that fighter-bombers met their needs.
The Army did use A-24s to cover the retreat from the Java sea, but they took heavy casualties.

[Chainmail]

It is also possible that the army air force despised close support missions. Their doctrine was "interdiction" to support the ground forces: killing bridges, staging areas, armor on the road and railroads. It is true that the SBD/A-24 would have had heavy losses against the Germans, unless that air defenses were accurately suppressed first.

But imagine what would have happened if A-24s or SB2Cs were used in direct support of the Normandy landing, taking out the bunkers and machine gun pits while the landing was under way at Omaha Beach. Just wasn't the air force way and those guys were just left with what they could carry and what little flat trajectory naval gunfire could hit that day.

MacArthur used Marine SBDs to support his scheme of maneuver on Luzon. Marine FACs used radio jeeps to direct the Marine pilots on target and the precise hits nailed Japanese defenses, saving soldier's lives and ending Japanese lives. It is said that MacArthur hated the Marine Corps - until he used them at Luzon.