Doctors try to help people, but given the limitations of medicine and the frailty of the human body, there are many times when they're unfortunately not able to do so. In fact, sometimes the actions of a doctor may even make things worse, because medicine is an imperfect science involving a lot of judgment, and occasionally a treatment that is intended to do good can actually do harm
...so that's where lawyers come in useful, with their "no win, no fee" lawsuits.
So between the two professions, there's something for everyone!