Kinda ironic I guess, that it was so technically easy from the outside (just give the Stop command to the next Waystone) to break out Vlag, but so desperate from the inside.
Like being locked in a vault that has a simple doorknob on the outside, but nothing on the inside.
I think it might have been more that they could not reach the doorknob, that would have been the point of contact where the Star of Chaos was in our vision.