It's also a place where a HC is safe even if he fails so it has that going for it. ;)
Seriously, there are plenty of good coaches who would take this job. It's not like any job that is going to be available doesn't have some major issues. Yes we have an aging roster and a high cap. But at the same point, we have a very patient owner and GM who will give any coach whatever they say they want/need and the time to build a team. There are many jobs where neither one of those things are true and many where at least one of those is not true.
If the cap situation for the next two years is a big issue for a specific coach, as I know it would be for you, then sure this is not as attractive of a job. But it does have things going for it that might appeal to other coaches.
Finally, even if Barnwell is right, it doesn't make him any less of an arse overall.