Parents Want Perfect

This was a thought I had a long time ago. Why do parents want perfect? Think about the saying, nobody is ever perfect, and then the saying, practice makes perfect. Practice can't make perfect because nobody can be perfect. But still, parents want perfect from kids. The parents get mad when you make a mistake, what about the saying, everybody makes mistakes? They aren't perfect either, they make mistakes too. But still, parents want perfect from kids. Nobody can be perfect, but still, they expect you to to practice until you are perfect at something. But that will never happen. So the parents expect you to do something you can never do. No matter how good you are, you can't be perfect. But why do parents want perfect? One of my theories are that parents regret not working harder when they were young, so they want their children to not regret that too, they work them hard with force. They do it because they love their child, I hope. But I don't think prefect is their intention, it is probably something like very very good. So when my mom works me hard, I will think that she is only doing that because she loves me.