I have never ridden a Tesla, and I plan on requesting a non Tesla car from now on when I have to take a taxi.
Cars in general, Teslas in particular, should have a standardized blackbox data recorder that third parties can open and access the logs, we have had this kind of tech on aircrafts for many decades.
It is terrifying that Tesla can just say that there was no relevant data and the investigative agency will just accept that.
I remember watching an episode of Air Crash Investigations, where a plane crashed, and they could not find an immediate cause, but the flight data recorder was able to be analysed far back, way before the accident flight, and they noticed that a mount for the APU turbine had broken many flights earlier, and the APU had broken free during the flight, causing the crash.
It is not Tesla's job to tell the investigators what is relevant and not, it is Teslas job to unlock all data they have and send it to the investigators, if they can't or won't, then Tesla should lose the right sell cars in Europe