Yeah, I think this really hits it. It's really not that he ever needs to call the Titans or anybody from outside the Bat-verse. It's that no matter which people he's surrounded by, the core of the character is about other people. It's his special skill, the natural way he solves problems and makes people work for him. That's not to say he can't work solo--he does and can. But every minute of the day this is somebody looking around at other people and being connected to him.
If you're going to challenge him by putting him in a situation where he's isolated it has to be done believably. This almost came across like it wanted to show that Dick crumbles on his own both personally and professionally which isn't really fair, especially when he doesn't even seem to remember that other people would make him feel better.
It's like doing a story with Batman where everything depends on him loving to work with others the way Dick does. Only instead of making it a fair challenge with Batman realizing he needs to work with others (because the situation believably demands it) and being aware that he'd rather be working alone and trying to do so at every opportunity, he just acts like someone who's always wanted to work that way and always has worked that way and just sucks at it.
So it would potentially read like a set-up for Batman to show that he's incompetent instead of a challenge you can really root for.