After Bachelor in Physics - Research?
To be able to do meaningful research, "hav[ing] some ideas" is not enough. Also, graduate school isn't just "two years of forced learning by repetition". Many graduate courses are very resourceful and teach you the essentials to understand what has been done in the areas you're potentially interested in.

While it is possible for you to learn on your own and do high quality research, your picture of grad school doesn't reflect reality.