People like to complain about professional politicians, but I haven't heard a good argument against them that outweighs their benefits. Wouldn't a professional

People like to complain about professional politicians, but I haven't heard a good argument against them that outweighs their benefits. Wouldn't a professional politician be better than one who doesn't really know what's going on? Governing is hard. Getting results in our political system requires difficult compromises. Creating policy, understanding the consequences of policy, and evaluating differences between policies requires domain expertise. Wouldn't someone with more experience be better?