While I'm a huge fan of vehicle automation, I have plenty of concern that it not be commonly used until it is in fact safer overall (I allow that come circumstances become less safe while others become more). I'm not sure what "cavalier" attitude you refer to? Where, exactly, are people claiming there is no concern for safety? What legislation has been passed that is seeing through rose-colored glasses?
Heck, the death referenced in the headline got lots of attention, both in criticism and in praise of automation, so I can see a lot of conclusions from that but "cavalier" isn't one of them. Looks to me like all sorts of caution is being considered, proclaimed, and hammered.
So what cavalier attitude is there that this article, with it's admittedly weak arguments, is good to be fighting?