I agree that no one should go into law as “a way to become rich”. I also believe the same of medicine. Come to think of it, no one should go into ANYTHING as “a way to become rich”. Do something you enjoy, or else all the money in the world won’t make you happy.
If you go to a halfway decent law school and get halfway decent grades, you may not be guaranteed a spot in BigLaw, but you can easily get a job in public interest. Or start with a local clerkship and go from there. The market is really not as tight as people think it is. There are tons of candidates, but also tons of jobs. You just have to know how to look for them, and be open-minded regarding your criteria. Obviously, the better your grades, the more selective you can afford to be.