I've heard disease like an osteoarthritic knee, for example casually explained away with statements like "your knee just got old and wore out." Why, then (in this case), is the other knee fine? Aren't they the same age, after all?
— Move Your DNA by Katy Bowman (Page 72)
Love this. While incredibly simplified, it does speak to the oddness of when people have “a bad knee” and attribute it to something like age/wear - when the other knee is perfectly fine. This at least tells us there are individual factors (likely related to lifestyle) that are disproportionately impacting a specific side of your body.