The only time Right and Wrong matters, is if some type of harm can come of it. If you practice, are proficient, are accurate on your target, and comfortable doing it, then it doesn't matter if you use your "Big Toe". And anyone who says differently is wrong. Yes, when you teach someone something, there needs to be a "Standard". e.g. when you were taught to drive a car, you were told to hold the steering wheel at 10'oclock and 2'oclock. And you crossed over your hands when making a turn. Now; if some of you still drive that way, then more power to you. If that is what make's you the most comfortable, and you never deviate from holding the steering wheel that way, then I'm impressed. But that doesn't mean those who hold the steering wheel differently are "Wrong". There is no wrong. Simply a standard that was being taught. Well, for most firearms training, it is best to say that using the pad of your finger, you can "Feel" the trigger better. That's great. However, if you've been shooting that particular gun long enough, you probably know exactly how that trigger and gun will react. You can shoot it any way you want to. There is no wrong way.