It's definitely not nothing, and the numbers bear that out: https://www.bbc.com/news/business-59008000
Whether this is one of those "we accept some number of school shootings cause gun freedoms are just so great" issues or not is I guess its own matter for debate. But the fact that this happens, and then as dudes we get to discuss it at arms length on the internet and opine about whether "99% of trips completed without incident" is reason to dismiss it all out of hand may help explain why an individual woman getting home from the bar might choose to walk or take waymo vs getting in a cab and risk joining the unlucky 1%.
The link you posted leads to the lyft report. The incidents we are talking about, vulnerable groups, is at worst 1/800,000 which corresponds to Touching
https://assets.ctfassets.net/q8mvene1wzq4/4jxkFTH5YCQK8T96ST...
1% Is a gross exageration if you go by this article / document.
Since you mentioned weapons: Robotaxis will have a social cost, and in Canada that is important in a way not seen in the US. Unlike weapons, there will be not much discussion about robo-everything.