Inventing a legal requirement out of thin air isn't "common sense."
I think that all legal requirements should be based on high moral integrity, honesty and equal/honest justice being applied. Obviously you have some demented measure for what constitutes a just requirement. My measure is moral integrity, and honest ethics and principles. What's you're measure? ... A whim pulled out of thin air or political agenda?
BTW the impartial jury requirement is not thin air. The sixth amendment, try reading it AND understanding it and you will see that it is not thin air. It's common sense applied and depicts moral integrity, honest ethics, honest principle and honest/equal justice.