AN2, I understand your unhappiness, the whole thing is far from ideal. But it's nothing new. With AA191 in 1979 when the port engine fell off on take off from O'Hare and the DC10 rolled to the left before crashing the NTSB initially put it down to metal fatigue in a bolt and showed it proudly to all at a press conference. It transpired to actually be due to a maintenance handling issue that damaged the engine pylon mounts through a combination of not following correct procedure and human error. This combined with in-flight emergency response procedures that turned out to guarantee a stall that led to the loss of the aircraft. The bolt was actually damaged during the crash. 36 years later we haver 24-7 rolling news. You just have to deal with it.
If the whole speculation thing is such a problem there is a solution of course; live video streams from all flights - cockpit, cabin and external. Technically easily possible, at a cost. That way at least we would know what the incident looked like almost immediately even with no living witnesses. It would not necessarily give you the exact cause, but would narrow it down considerably.