In my opinion, Dan has no business being a head coach in the NBA. I like him, he was one of my favorite players back in the day, I liked him as an announcer, I am sure he is a great guy to have around, but I've seen nothing that would suggest he'd be a good head coach.
Having watched Dan since he began, I share your opinion. His personality, similar to that of Mark Grace, is that of the adolescent
bad boy. Y'know, the kid with a constant grin on his face looking for mischief.
Even if he surrounded himself with the best and the brightest as Head Coach, he just doesn't have the aura of a figurehead -- the image at the top of the in-front-of-the scenes chart.
Captain of a schoolyard bunch of jocks, yeah. The face of a multi-million dollar business, as you said, we've seen nothing that would suggest he'd be a good head coach.
All of this is opinion. I wouldn't dream of giving him an NBA Head Coaching job without watching him try it for two years in the D League.