Your role as a protector won't always be appreciated by your child. It's not an issue before they're able to walk around independently, but from that point on they see you as a prison guard, always stopping them from doing the things they want to do. Why can't they touch a hot stove? Why can't they go to the park on their own and see their friends?
When they're teenagers, it gets even worse. Why can't they stay out all night? Why can't they go out drinking with their friends? Everyone else's parents apparently allow it, and you're the worst parent in the world. All you're trying to do is keep them safe from the people and places that might do them harm, and they can't see it. It's a thankless task. One day, though, they'll have children of their own, and they'll finally understand why you did it.