I feel for any relationship to work out, there should be humility as well as balance.
In terms of work, I feel that sometimes a line needs to be drawn when it comes to working OT. That's what myself, my husband as well as most of my friends do. There're certain days which are "untouchable" and they'll spend that time with their families.
I would think that yes, most parents would know what is best for their children when they think on behalf of the child. For parents who make use of their children and whatever else I feel they are either selfish or they themselves have been in such situations or they themselves have never experienced love and concern.
I also have many disagreements with my parents. But I know most times they say things because they feel that it was the best for me. I know that many people now also have many disagreements with their parents pertaining to how to bring up kids or what to feed and whatever else. For me, I try my best to explain to help them to understand what I am doing. If they cannot accept it, I would just have to remind them that my baby is mine and I will be responsible for my actions.
In our parents' generation, I would think that they would always feel that parents are always right. But for me, I feel that even as a parent I will still make mistakes. I wouldn't hesitate apologising to my child if I know that I have made a mistake. That's what I mean by humility.