Relevance
If it was Commercial Pilots only contributing here, the thread would stay far more relevant (more or less!).
However it is open to all, so we will get subjected to lots of off-track contributions.(Insurance, telemetry, piracy to cite but 3!). To be fair, 99% of air accidents involve pilots directly, but there are the occasional ones such as the Ukraine shoot-down where the pilots will not have had a clue and were doing their job correctly. (Note I say "involve", not ascribing blame unilaterally)
Speculation can be good; however, as the national reports can take a long time to be issued and in some cases are worthless. And manufacturers need to react quickly if a technical issue crops up, in order to prevent further accidents long before waiting for the national report to be issued.
And officialdom can anyway be hopelessly wrong, or biased. Their "facts" can be as correct as a politician's. The Egyptair 767 mid-Atlantic suicide crash is widely seen as a case in point.