I might suggest inexperience with SFO is a major factor. There are many AC pilots who read a route Brief on the airport but it doesn't give you all the answers or information. Also the Airbus managed descent for the arrival usually leaves the aircraft high and many pilots are distracted in getting down and slowing down usually getting stabilized between 1000 and 500 ft.
After the Asiana incident I thought the ops in SFO would have the landing runway ILS operating. Hard to ignore the localizer, or may be not.