Case 1 and 2 are covered with FaceID - you have to be actively looking at the phone, drugged/eyes closed/looking away/etc. won't cut it.
This seems extremely inconvenient for binge drinkers* that need to Uber home or call a friend.
*or light drug users
Case 2: Hold open the eyelids with tape. Even if the eyes have rolled-back in their sockets they can be re-positioned with some manual adjustment enough to get the system to work.
How is this different?