Why Don't We Have Professional Jurors?

When I received a summons to appear for jury selection, I dutifully drove to the courthouse on the day in question ready to establish my fitness to serve. 
No, that’s not true.  I drove to the courthouse on the day in question ready to answer their questions – and curious as to whether one or both of the lawyers would decide they’d rather not have me on the jury. 
When I received a summons to appear for jury selection, I dutifully drove to the courthouse on the day in question ready to establish my fitness to serve.