I am pretty sure that the Tasmanian tiger is alive and well and may now be comfortable enough about a human presence to occasionally be seen. This case had the animal running with a group of kangaroos which is unexpected but certainly provides screening for a shy carnivore.
There is also an apparent population in New Guinea mountains as well. Thus its extinction is unlikely. More likely it is now broadening its range which will bring about increasing contact.
The key take home for all is that a family of critters can share information mind to mind and then uniformly avoid any contact. i suspect that this has happened to a number of the larger creatures who are also smarter as well and we end up having far less contact than could be expected.
This man got a full view of the animal in broad daylight and it was unmistakable.