Well, there you go. The fundamental disagreement is that you don't value him much and I do. Pretty sure we'd disagree about what a "decent" package for him might be. Sure, we need a stud. But, IMO, trading him for a mediocre young Celtics benchwarmer, or several, and a low 1st arguably moves this team further away from getting a stud than keeping him.
The best argument I see that it helps is that trading him makes the team worse and makes them more likely to get a higher pick. But the problem there isn't HB; it's Walton. I'm not a big fan of the tank, but if that's the strategy trading good players who can help you next year and beyond for chickens**t isn't the way to do it. As many have said, how about starting by not playing Fox/HB/Buddy massive minutes, and actually playing/developing the reasonably promising young guys who just might become solid contributors w/playing experience? As it is, we barely know what might be sitting at the end of Walton's bench.
Your assessment of him notwithstanding, HB is the Kings' 3rd most valuable trade piece right now - arguably their second given Fox's massive contract - and no one expects Fox and TH to go anywhere in any case. Trading him for more young players no better than the ones we have who can't get on the floor would be a pretty poor use of the team's too-scarce assets IMO.