I apologize if my interpretation of reality conflicts with the demigod image of Bill many of you have constructed in your minds. But, at this point, Bill needs Bob far more than Bob needs him.
Belichick is not starting over elsewhere as if anyone else would want to hire a prickly, diva 71 year old as their HC anyway. No one else would let him chose a trusted assistant as his successor or continue the coaching careers of his sons.
Bill is acting nobly here. He’s trying to rebuild this thing before exiting and keep the organization of people he’s built here over the last 20+ years gainfully employed after he departs.