I can't speak for HRB, but frankly, personal relationships of players, especially after the band breaks up, is about the last thing I'd put on a list of reasons I follow sports. Actually, no I take that back. It wouldn't even be on the list.
Emotional connection appeal, for me at least, comes from my own personal feelings for a player, not theirs for their teammate. If it were a Kobe/Shaq type thing, that caused a team to break up and ruin chances at rings, sure, I'd care during the moment. If it's a clubhouse issue that's affecting team performance, sure. When it's a role player basically jumping off a sinking ship to go ring hunting on the biggest rival for less money? Sorry, I don't really mind if Garnett never speaks to him again. Actually it makes me like Garnett more. Doesn't change anything for me when thinking back to the ring they won.
It's cool that Edelman and Brady have their bromance, but if they never speak again after retirement, how does that change the "magic" that won them rings? If it came out that Johnny Damon and Jason Varitek never spoke again after Damon pulled his Judas act, would that really tarnish 2004 for you?