Leash to Harness NOT Collar when Riding with your Dog

Am l the only one who gets upset whenever l see somebody riding their bike, jogging, riding their skateboard really fast while holding a leash connected to the NECK of a Dog Collar with their Dog?? l mean come on - at LEAST connect leash to a harness instead of collar - just for safety so you don`t choke, break neck or kill your dog - l mean - really?? Why is this legal??