The reason I’m essentially okay with having to click on the rider list is that I can hover the mouse on that side of the screen and basically leave it on one place for the duration of my ride. Any adjustments to click on a particular rider are very small adjustments within the same x / y screen area.
Conversely, the back arrow is on the complete opposite side of the screen. It is not a matter of how long it takes to perform that operation; it’s how terribly inefficient that operation is, mechanically. Having an on-screen button appear where your mouse pointer has no other mid-ride function is, from a user interface perspectively, perhaps not the best choice.
Efficiency in cycling is one of the keys to top performance. The manner in which you perform an operation is typically the same action as its reverse operation. Imagine if you changed your rear deraileur to s small cog with the shifter on your hood, but changed to a larger cog with a shifter on the down tube. Sure, it would work, but it can’t be described as efficient.
Research has demonstrated beyond debate that keyboard shortcuts are a magnitude more efficient than mouse movements and clicks. If Zwift is about cycling, and cycling is about efficiency, then a request to make Zwift more efficient seems reasonable, particularly when the change would require so little code.