I did complain once... 3 years ago about this underdeveloped feature (
https://forum.reallusion.com/375400/RE-Camera-placement-on-timeline#bm375692 ), but then I stopped using it altogether.
To place an object on a timeline I use Object Related Track button.
That is I keep this button grayed out (OFF) at all times. When I need to place something, I select this object in scene manager, then click Object Related Track twice.
With first click the object is placed on a timeline, with second click that button is disabled.
If you leave this button ON all the time and select an object in Scene manager, everything would be removed from the timeline and that particular object placed (which is also needed sometimes).
Once you get used it, you will forget about Track Menu List.