Dick Greenhaus 'nailed it'....

There are courses taught in how to 'play' a jury, and well-worn techniques in selecting & rejecting jurors to get the result you want!

There is well-worn saying something to the effect that "a jury consists of 12 people assembled to determine who has the best lawyer"

A panel of experts is FAR more likely to determine whether or not real malpractice has occured. (yes, I realize that selecting the panel has its own pitfalls, but it would be easier to oversee than juries)