How handling an automobile crash not as a special case is the weird part. Even in the <$50 dashcams from Amazon there is a feature to mark a recording as locked so the auto delete logic does not touch the locked file. Some of them even have automatic collision detection which locks the file for you.
How Tesla could say that detecting a collision and not locking all/any of the data is normal is just insane.
Also this is not like some process crash dump where the computer keeps running after one process crashed.
This would be like an plane black box uploading its data to the manufacturer, then deleting itself after a plane crash.