I think Danny is sort of down-low pointing out why we shouldn't be too surprised if this team struggles in the playoffs again.
In the playoffs, everybody tries hard and rotations shorten. Being the team that gets by on "grit and hustle" doesn't help you stand out as much anymore. The playoffs is about executing and making shots.
That's fine, though, because this team was never intended or expected to go deep in the playoffs. It's a prototype for what could be moving forward if Ainge can upgrade some of the placeholders -- admirable, likable, hustling placeholders -- we've got right now.