Avengers: Infinity War - Hulk wears the Hulkbuster armour

Is there a reason why an Iron Man suit was not made for Bruce Banner to use when he transforms into the Hulk in the Avengers: Endgame and Infinity War movies?

Amazing Hulkbuster Iron Man costume

AVENGERS: INFINITY WAR Deleted Scene Features Hulk Busting Out Of The Hulkbuster Armor — GeekTyrant

The New Hulkbusters Are So Much Worse Than Iron Man's Original

Is there a reason why an Iron Man suit was not made for Bruce Banner to use when he transforms into the Hulk in the Avengers: Endgame and Infinity War movies?

Iron Man 3: Hulkbuster Armor Confirmed?

Here's every Buster suit in Iron Man's armory/wardrobe : r/TwoBestFriendsPlay

Hulkbuster The Figure In Question

If you could add one scene to the MCU of your liking, what would it be? I'd have Hulk burst out of the Hulkbuster and smile when Thor would arrive, but then