Why does it take so long to become a lawyer? Why do laywers have a monopoly?

I honestly don't think that 4 years of undergraduate school and 3 years of law school is all that long. I thought it was a fairly short period of time. I mean compare the length of time that doctors have to go to school.

I see it as you wouldn't want to go to a doctor that only went to 7 years of school outside of grades 1-12 like lawyers because your health might be in jeopardy. I want them to get as much training as possible if I am going to a doctor. I don't see doctors getting dumped on because of the cost of medical care and the cost of medical insurance. In turn, if I needed a lawyer, I'd want he or she to get as much training as possible. My life my get screwed over by some moron trying to sue me or I might end up in jail if my lawyer only went through minimal time in training. It's all up to how much you are willing to pay for. I mean you'd want the Harvard Medical School Brain Surgeon Valedictorian to do your brain surgery just like you'd want Johnny Cochran to defend you in your murder trial.