So lawyers shouldn't vote? Shouldn't lobby for changes in law? Shouldn't encourage each other to take up fields to help those with legal recourse (ex: public defenders)? Shouldn't discourage lawyers from going into money-making schemes that effectively exploit those without money to defend themselves?

There's a lot of room between "lawyers have no responsibility for remedying injustice in the current system" and "lawyers should just decide who's guilty and refuse to deal with them".