Well, I guess every dog is different. I've clicker trained my dog and she doesn't beg at the table and she certainly doesn't grab anything out of my grasp when I'm eating it...but I guess I can see how that could happen. Too bad for the dog and for you. That's why I always say that it is not for every dog. But when it does work, it works very well.
The only thing I don't like about clicker training is the fact that you can't use it for housetraining. It's a great communication tool for everything else but housetraining. That's probably why I'm having such great difficulty right now with my pup.
Anyway, I'm glad to see that you have your methods down and that you care so much about your dogs. It's just that I don't agree with all that you say but that's all that it is really, an opinion.