I think they underestimated the ability, competence and technology of law enforcement at the operational levels.
It's a good thing there was no plausible way for Obama and Napolitano to hold law enforcement back or the two brothers would be on their way back to Chechnya in a Homeland Security Learjet and Napolitano would be waterboarding Wayne LaPierre on The View.
So yes, by demanding they release the images, many lives were saved. These guys were not going anywhere.
One of the victims identified the bombers.