That last part is actually scariest: blame the victim, yay. Unless they can prove they had a functional, powered, up to date, compatible I'm-a-car responder, it's their own damn fault for being invisible to the SDV. How about "I'm a human, don't hit me"? Does that also sound like a good idea (RIP Elaine Herzberg)?
In other words, "all other road users should accommodate my needs just to make life a bit easier for me" is a terrible idea.
I think that's a needlessly uncharitable interpretation.
Having cars communicate information to each other has the potential to be an additional safety measure. It's like adding reflectors to bikes - adding them wasn't victim blaming, it was just an additional thing that could be added to reduce accidents.
Sure, I understand that you're proposing it as an improvement , and it would even be an improvement - but using this for scapegoating will happen, as long as there are multiple parties to any accident; we have seen this in the last Uber crash ("find anything pointing anywhere but at Uber"), or in any bike crash ("yeah, the truck has smashed into him at 60 MPH and spread him over two city blocks, but he's at fault for not wearing a helmet - it would have saved him!!!").
In other words, "all other road users should accommodate my needs just to make life a bit easier for me" is a terrible idea.