This raises an interesting point, but neglects the fact that it's not possible (for good reason if you think about it) to simply volunteer for jury duty. In order to be eligible in most (all?) jurisdictions one must simply register to vote.

Neglecting the fallacy of the presumption that one can just volunteer, it is interesting to think about the way the world might be shaped should "more educated" individuals be the ones who solely shape public policy and case law. It's not very democratic in the pure sense of the meaning, but certainly interesting as a thought experiment.