Sorry, that’s not what I said. Having the width scale based on emphasis is fine. We can’t increased the clickable area outside of the visible item label area. This is because if you have the above situation, you could click on one but it would pick up the other item.
The reason that variable width size on emphasis is ok is that you already have a variable width from item to item based on name length. They all have uniform heights which is the important aspect to keep.