That said, if the good-ol'-boy-ism exists, wouldn't you prefer it exist in the hands of a group of disparate individuals chosen (mostly) at random?
I'd prefer that situation over it solely existing in the hands of a few police/judges/etc. with incredible power in deciding the future of the lives of those without power.
Yeah, good-ol'-boy-ism can be present in any part of the justice system. There's no reason to believe it would be worse among the jury pool than, for instance, among prosecutors, judges and law enforcement.
I'd prefer that situation over it solely existing in the hands of a few police/judges/etc. with incredible power in deciding the future of the lives of those without power.