Crashes generally have multiple factors. For the moment, let's set aside the multiple driver errors (not just drunkenness) and focus on issues Tesla has control of which contributed to the death:

* FSD was wildly insufficient for this road and required constant driver input

* Despite being insufficient for the road, FSD could be enabled on the road

* Despite needing constant correction, the FSD stayed enabled

* FSD can be enabled at speeds and conditions where the driver would need to correct with very little notice

All of these are completely self-inflicted issues caused by Tesla management arrogantly insisting on having the FSD attempt much more than it is capable of. Compare this to Ford and GM where they carefully geofence their systems to highways where they are absolutely certain their driving aids will work.