It's because they are... too hard! People are soft body beings, consisting of thousands of muscles and bones. While robots are stiff metallic objects, moving with only a few motors. Our bodies can bend quite a lot, swim, jump, roll, dance, etc.

The only downside is that the knowledge. Your Dad can manage to transfer his life experience to you in a matter of years. And you'll be able to understand most of it it around your 16th year. If you teach a robot to dance, you can instantly (or in a matter of hours) transfer that knowledge to another robot with the same design.

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Eventually robots can and will become better than humans in many things. But it is going to take many years (unless we kill each-other first).