I'm not sure what you mean by that, Revelation, but I meant the human factor/loss is sad.
I think speculation as to cause of the accident is secondary, but natural. We all realize the F-35 is basically stealthy from the front only.
All of the above.
My thought is that disappearing off radar suggests either the onset of the event was very sudden and didn't leave time for communication, or the communication system didn't function, both of which are troubling for a system that has gained operation status and has had immense resources applied to its design, manufacture and testing.
I supposed we could/should allow for a medical issue disabling the pilot suddenly, or perhaps suicide, but those seem to be outliers to me.
Overall, it's sad for the pilot and his/her loved ones, sad for JASDF, and sad for other F35 operators, and sad for LM and its extended supply chain.
Oh, yes, and also sad for the taxpayers who paid for it all.