I can agree with you on some points but we have a fundamental area of disagreement on this subject.
JBB is the Head Coach and he has a whole coaching staff at his command and disposal. Where is it written that the Head Coach must be the final authority and expert on every detail of managing every single aspect of the team? Why can't JBB continue with doing what he does, but have an assistant who specializes in JBB's areas of weakness?
I assume you'll say something like, JBB's ego won't allow it. I have a hard time believing it but if true I could support moving on to a different head coach. But, if I were Altman, I'd be having these kinds of conversations about how to improve in any and all ways possible for every aspect of the team, and this is something that should be on the table just like everything else should be on the table.
If as an organization there is honesty, transparency, self-evaluation and constructive criticism, I would think that such deficiencies would be identified and corrected by doing whatever is needed. I don't see it as an all or nothing proposition, where either JBB has to be perfect in every aspect of his job, or he needs to be fired. If that is the reality then I think Altman is the one who is the problem. He should be able to manage JBB and give him the help he needs to become the strongest possible organization.
Your approach seems to be kind of a helpless absolutism that people can't figure out and resolve such things in order to improve. I don't think intelligent people should operate that way, although I know sometimes they do. They need to do better. Recognize problem, communicate problem, resolve problem.