There will still be enough incompetant lawyers to become politicians.
you don’t have to be a lawyer to understand government and politics. Yes, there is much to learn, but the underlying principles are simple: the individual v. the state, who gets to control the money?, who gets more power over what?
Moreover, our American Revolutionary History puts many of the modern debates in an easily understood context. The trick is in being able to make full bodied intellectual arguments about how vast elements of our own federal government are more oppressive than King George ever was.
What humans will tolerate is no justification for tyranny.