I am not really clear on your understanding of the "best". I guess the idea of being the "best" is very subjective to the individual. Also, you talk about "succeeding" in life. That is also very subjective to each individual. Even though I will also be pursuing medicine, I have never thought about it as success. I look at it as something I am meant to do.
Furthermore, most people could easily become a physician. It isn't necessarily hard to become a physician -- just takes a large amount of determination and the willingness to put life on the back border.
Also, when you are on your death bed looking back at your life, will you honestly be thinking to yourself, "gosh, I am so glad I spent my entire life to be better than everyone else and to be a success." I would prefer to be thinking, "I am so glad I LIVED my life.. I am glad I had time to spend with friends and family and make a difference by raising such wonderful children..."
And if I were to compare you against a factory worker who was successful at raising 3 wonderful children, while maintaining an honest life with his wife and children.. just being a happy guy living life, enjoying life, raising children, and just maintaining what he has.... I would honestly see him as a far better success than you who was so conceded to think you had to be "better" than everyone else.