I mean, I could see it working on a level. But you'd have to go in knowing that you were going to get chewed.
Every time that Trump went somewhere, it was sanitized as hell to protect his ego. The few times it wasn't he immediately turned it into a fight.
If he had gone into it with an open mind or even remotely humble... well, okay, Trump would still fuck it up, because he's Trump. But Hulk might have been able to just sit through an open forum that would initially would shit on him but might actually produce some food for thought. If nothing else, people would remember that he tried something, and some people would give him credit for that. Ignoring the issue was only going to work if he had just stayed out of the spotlight forever. Showing back up and being an absolute over the top ultra-conservative asshole was the worst possible thing he could have done.