And one more...
Power = (Force x Distance)/Time. Most of that cancels and the difference between a pro-like rider and not is force on the pedal - and rider mass (generally). So a 140# rider putting out the force of a 230# rider is going to be taking lots of pressure off their hands and other parts. They can get lower. That 230# rider should be more upright. Not because of aero, but because of pressures. Copy the pro when you are pro weight and pro power.