What's the point of a self/assisted driving vehicle then? If it doesn't compensate for human error, then it's useless, since humans can already operate vehicles.

The human operator was monitoring an automated system from which is can take tens of seconds to take control back until the operator is at full capacity.

Additionally the automated system clearly recognized the situation and 1.6 seconds before impact determined it should be engaging the emergency brakes. However, Uber disabled those because the Human operator was responsible to take several seconds to reorient before doing an emergency brake.

Semi-autonomous systems like this have the effect of reducing 'driver' attentiveness.

That was my point, human operators are responsible for not hitting deer yet it happens every day. The only reason it doesn't happen to people more often is that people are better at avoiding running in front of cars.