Obviously the spectrum is huge, and is different for everyone, but from my limited experience it has absolutely nothing to do with knowing right from wrong.
I know there's two kids of a wider family member who is autistic. Right and wrong for one of them isn't the issue. When he's in what could be called a meltdown knowledge of right and wrong isn't a factor. He's violent and not in control. I could quite easily see how he could have put that woman into this road if he'd been there in the wrong circumstances, such as agitation.
This guy is about 40 now and a 6 footer plus heavy set. It's seriously amazing how much his mum is able to control him when things are going wrong with him. Nobody can do that anywhere close to her. Not even carers who have been with him for a long time.
The other kid, who is about 3 years younger, is higher functioning but less social. Not as violent in meltdown but still. It isn't guaranteed that the younger sibling would be safe in this original situation.
I do not know enough about this woman to know how much of an issue her ASD was but a bit of compassion for her difficulties is warrantied. She might not be a nasty old bat. I think that's unfair. However, an unnecessary death is always a bad thing. Imho the biggest takeaway I can see is that pedestrians and cyclists aren't exactly compatible. We really need better provisions and infrastructure for cycling and pedestrians. Holland and Belgium do this well. We need that too!