And who evaluates the mentors of these apprentices? What if they are the Weinstein of legal practice? Or they have a tattoo of a bowling ball covering up the swastika they had done when they were 17? Or maybe it's the apprentice who has the tat, and is getting preferential treatment.

Just like utilities written in C, the fact that they have not shown obvious flaws yet is no guarantee those flaws don't exist.

Nah. The more objectivity, the better.