Can you solve these physics riddles? ft Simone Giertz - Part 1/3

I'm pretty sure I heard the reason for the left hand thread on the left pedal is so that if the bearings wear to bind, the pedal would screw itself out rather than keep tightening and potentially stripping the threads out of the crank and ruining it.
But there's also a left hand thread on the right hand-side bearing cup in the bottom bracket of the bicycle - where the cranks attach and rotate in the frame. The cup retains the bearings with the axle rotating inside of it so as the cranks turn clockwise, the bearings translate this clockwise torque into an anticlockwise torque on the retention cup. The cup is left hand threaded (in the common British standard) so that it will only get tighter due to the force of the bearings, while if it were right-hand threaded (as it is in the Italian and French standards) the right-hand side cup unscrews itself over time. I think the thread design in the bottom bracket is stronger so there is no fear of the threads being pulled out by a tightening bottom bracket cup - the bottom bracket becoming loose and making the pedals flop side-to-side is far more likely to cause damage and make the bike unridable.