Yeah, the source of the problem was that the founders and the professor were out of sync. If they agreed with him, they shouldn't have been in that meeting in the first place. If they disagreed with him, they should have stood up in the middle of his rant and told him to stop talking and leave the room.

As it happened, I guess it was uncomfortable for them to discuss, so this scene, which is just about the worst-case scenario, came to pass.