we all won't be the same or agree on same methods because of our experiences. We have seen parents that will advice another adult to discipline a child in a certain way because they belief it will be effective.
One good way to train up a child is to give them reasons why to or not do certain things you tell them, unlike our parents, they see it as a disrespect: we had to find out on our own. Kids are smarter these days and a higher level of intelligence is needed to train them well.
Yeah... we had to find so many things out on our own. For some reason, we were just expected to know, or they felt we were too young and not mature enough. so they never told us why. It was the mistake they made.
I believe they were brought up that way too, so they did same. A big mistake that shouldn't be repeated.