Theory vs experience….It wasn’t until Late 2000 that physicists finally documented how it was that a bumblebee could inconceivably move such massive weight with such tiny wings….of course that was neither here nor there to the bumblebee who had pollen to gather. So it is with those of us who ride…rims regularly go out of true in a sidewise fall and flipping a bike upside down to change a flat or lube a chain has no detrimental impact on the performance or durability of the bike, whatsoever. So theorize and opine all you want…we’ll keep riding, and fixing, in the meantime.