[partomniscient]

I think risk is extremely pertinent to this situation.

The (relative) silent expert to those more audibly expressing/pronouncing is also considering the outcomes of releasing information that is highly likely to be correct, and what may come of that information becoming public.

They also take into account the scenario where they may be wrong or only partly correct, and if so what are the long term problems that may result in being wrong (or even in being right - take the heliocentric model of the universe for example). Therefore they may deem the risk too high.

We're still finding out what a search engine monetised via advertising does to the world.