Ok so will i be an asshole?

So my mother tries to manipulate me into being a doctor and i jst wanna tell her that i cant and dont want to live a life where she controls my life path and career. I used to want to become a baker, chef and even a singer but then she lectured me saying that i can do those things while being a doctor. But doing something i hate for a living but can still do my hobbies is different than doing something i love for a living. It jst feels different. But my mom gets tired easily but i want to say everything on my mind. So if i do decide to tell her wld i be the asshole?