You're not anywhere near as clever as you think you are.
Since you don't seem to want to expend any brain cells into the topic despite constantly posting in it, let me tell you a little bit about political culture. You may not think Fallon's little shit here will result in anything because it doesn't result in a direct polling bump, but Trump's message and attitude, and most importantly, his supporters and ideals, does not begin and end at his campaign. If these people see a political campaign that includes plenty of MSM coverage that includes talk show hosts palling around with the guy and patting his head, it legitimizes their shitty views in their eyes. And even when Trump loses, it contributes to the CULTURAL impact that this man continues to have.