you're talking hypotheticals while in real life for example:
"A Waymo self-driving car blocked a road near a deadly fire, hindering first responders. " https://www.youtube.com/shorts/6uhcVYhmULU
"Waymos blocked roads and caused chaos during San Francisco power outage"
https://www.nbcbayarea.com/news/local/waymo-san-francisco-po...
Waymo and specific people there responsible for that programming/bugs could probably be charged with criminal negligence by an enthusiastic prosecutor, yet haven't been. Why? Probably common sense. Like recognizing that there weren't criminal intent. And such situations is a price of progress. The same with protests. They weren't conspiring to block ambulances. And such situations is a price of freedom of protests and speech. Though if somebody dies that way, i think they would have a civil case against the protesters. The same way like affected people can have a civil case against Waymo in the situations mentioned above.