Because many Innocent or Overcharged people are swept up in this Witch Hunt of a "crime sweep". Innocent people need defense, too, and some laws are unethical or immoral or the sentencing is often too harsh. We need good lawyers to defend against these tyrannies. So, a few truly Guilty, remorseless one slip by. Someone has to defend them to the best of their abilities. Or, the State Bar Assn. will have their license. Many courts are biased and inflexible and defense is required to keep our Constitution alive and safe. Plus, the interesting cases. Wouldn't you like to see your name on a precedent or test case or class-action suit that went Your way? A feather in your cap! I am in a dispute with the letter of state vs. Fed law right now. I find no precedent or test case. I simply see what the law says and that it is stated in black and white I am Not guilty. Still, to see this case get Recorded as I Beat the System would be such a rush for me And my counsel!
A friend of mine had to go to the bar association because his attorney embezzeled money put into an escrow account to pay for his medical bills. The Bar association has a fund to compensate people for malfeasance by their members. At first they were not going to pay my friend because they had disbarred this attorney and they said he was no longer a member. But he kept pushing and they made good on the money stolen.