Sometimes a single, properly timed, strong enough to be effective, correction is more humane as it nips a problem in the bud so to speak and the dog does not spend any time in the bad place, where they are working themselves up, barking at people, dogs, kids, whatever, and we are trying to work with them slowly and carefully under their threshold.
You really can't explain that well, because the owner has to be savvy enough to know the dog, to have the right timing, to give the correction with respect to the dog, etc. And, frankly, too many of them will be too wimpy, too late, or too heavy handed for the dog they have.
If it worked, good.
Don't worry about the people in the pet store. Let them be afraid of you. Who cares. They do not have to live with your dog.
Heidi Ho, Odie
Joy-Joy, Bear Cub, Hepsi-Pepsi
Cujo2, Karma Chameleon
Ramona the Pest, Kojak -- who loves you baby?
Tiny Tinnie, Susie's Uzzi, Kaiah -- The Baby Monster.