A weatherstrip channel goes inside a door. A window sweep is just the fuzzy part that contacts the glass. I said it's worth repeating so here is one more try... The vertical molding which attaches to the quarter at the top front, and the molding which attaches to the row of studs at the top of the door, need to be in place when establishing door gap. Once you try, you will know why. How the belt molding lines up with the fender top rear molding and hood rear molding is also important while establishing gaps of all these panels. You can slice and weld until a 5mm ball bearing will roll down all the gaps perfectly then one day try to install these moldings and find yourself running in the wrong direction.
I agree that chrome body side and door edge moldings would look silly.