I don't know for sure, but you are probably right. With high-performance (combat) aircraft, the design philosophy is often too tolerate dynamic and static instability (a workload nightmare for pilots) and simply use FBW and computers to stabilize the plane artificially.
But that does not necessarily mean it would be humanly impossible to achieve some control over the plane. It might be the case for the B2, but for a passenger airliner, I would imagine the pilot would still be able to achieve some authority by thrust differentiation and maybe deploying spoilers differentially, too. Landing safely would be a near-impossible task. But achieving a certain control over the flightpath, given a reasonable starting position, would probably be achievable. The thing is, 2 minutes after takeoff is not a reasonable starting position to try and regain control. Also, how do the pilots know they lost their tailfin? There is no "tailfin presence indicator" in a cockpit, is there? Basically, they needed to react to the situation, without necessarily knowing what had gone wrong, thereby being unable to do the right thing. And even if they did the right thing, they were probably too late (human reaction time) and too low to do anything.
If that is the scenario, of course. I still prefer waiting for official theories and reports.