I have a conceptual issue with the Touch Bar. I’m struggling to understand what the Touch bar can achieve that a toolbar that exists on the screen would not be

I have a conceptual issue with the Touch Bar. I’m struggling to understand what the Touch bar can achieve that a toolbar that exists on the screen would not be better at. Especially on a laptop with the great trackpads that the MacBooks have. About the only benefit is that it doesn’t take up screen space, but in that case a single trackpad gesture which brings up a touchbar like toolbar right where your mouse pointer is seems like a much nicer input mechanism.