Some play tug, some don't. Some have caused problems, some won't. Some drink pepsi, some coke. I don't think anybody here has all the answers.
I like to play tug and when people say it will make my dog a certain way, I just chuckle and move along. I live with my dogs and interact with them every day. I think I have a bit better idea of what i'm living with than anybody else does.
If somebody else notices their dog acting a certain way and think Tug isn't a good thing to do, so what. They probably know their dog better than I do.