I dunno, but in my experience the defense generally excuses anyone with an advanced degree in the hard sciences (including pharmacy, btw), while the prosecution rarely excuses anyone. I wasn’t counting but typically, the defense excuses about four jurors.
they are going to have a jury full of retirees or stay at home moms who have older children - the breadwinners can not afford to stop working for 8 or more weeks and Moms with school age children won’t have anyone home to care for the kids during the day - I would think retirees might be good for the defense since they are sometimes more sympathetic but homemakers won’t be good for Casey - more judgemental and aware of what is typical vs. completely out of the norm behavior.