Yes, she crossed where it's forbidden to cross, but...
These links put the incident in a very different light to the dark dashcam footage:
https://www.google.com/maps/@33.4363673,-111.9425082,3a,75y,324.7h,86.2t/data=!3m6!1e1!3m4!1sseIHdIkV5FyYzACTGokvBg!2e0!7i13312!8i6656
https://imgur.com/gallery/XQrAB
The road widens at this point, although you can't see that in the original dark dashcam footage.
The lady with the bike was crossing her fourth lane by the time she came to grief.
- From the pedestrians' perspective, it's a lot harder to time/judge how fast a car is coming when she left the kerb so much earlier. It was not a wise place to cross (and is forbidden by signs) - but the her error in judgement of timing is much finer / more forgivable than other reports or a view of the dashcam alone would suggest. As pedestrians, we've all made similar misjudgements a handful of times in our lives. The car would only have had to slow by 5-10 miles per hour a few 10's of yards earlier, and the lady would have made it across the road; it would have been close, but she'd've been ok.
- As far as the car's navigation cameras / systems are concerned she most definitely did not "step off the curb into the path of the car" - she'd already crossed 3 lanes, and should have clearly been identified, and identified as being on a collision course.
The car definitely should have been able to prevent this tragedy.