as you can see, it depends on your goal. if you are chasing a number and dont see the value of training each leg individually to improve your overall performance...then you wont do them.
i'd challenge anyone to strengthen each leg individually, increase stability and neuromuscular efficiency and then say....
"dont bother"
we spend 50% of our time on one leg or another when walking. unless you guys go bounding round with your feet tied together.... or eat, sleep and shit with your feet planted in the squat rack.
lol.