She was hitting all the ICE/DC facilities one by one, she didn’t know which one had what she wanted - she didn’t even know what she wanted, she was getting access to databases to figure out what V-Max was and who knew. It would do nothing at all to send the Hulk to trash a place she didn’t even know had the information or not, trashing places was not the point, and she obviously wouldn’t have been able to keep using him on all of them one by one. The argument of “they have a nuke, why don’t they always immediately fire it where the enemy boss is hiding, are they stupid” never ever works.