When I first started my flying career my first real flying job was crop dusting. ( Aerial application. )
The company had three types of airplanes, we started on the J3 Cub then went to the Super Cub and finally the Stearman with the P.W. 450 hp. engine.
Only the Super Cub had a starter the other two we hand proped.
So we grew up with prop safety as a natural talent.