The son is a pragmatist. He loves his dads but takes a realistic appraisal of the situation and asks them to sacrifice their identity, at least for this weekend. Its a mistake and not likely to work. We know that early on, but the elaborate preparation leads to countless opportunities for comedy. You are supposed to hate the premise and the antagonist Senator Keeley, who they proceed to dunk on the whole movie. It then leads to conflict, drama, farce, and ultimately resolution. And, one of the best endings in comedy. Morality tales, which have withstood the test of time since the dawn of civilization, are in jeopardy. Because with our society’s short attention span and viewers watching clips and reading blogs, they don’t always understand the material and make judgements before the resolution as if storytelling works when everyone is perfect and reasonable all the time. I dont think thats where you’re coming from. The son does come off as a jerk.