It’s good that the industry does the right thing sometimes. It’s also good to have strong consumer protections when they don’t do the right thing.

The bill that required backup cameras came out in 2008 but didn’t fully go into effect until 2018 in order to give carmakers time. (At least) Some of what you’ve attributed to “becoming a standard” is due in part to automakers anticipating the regulation and another part of it being social norms as more and more cars have them so consumers ask for them.

I bought a car circa 2009-2010 as did a bunch of my friends (graduated college in 2008). We bought some of the most popular cars of the day, and zero of them had backup cameras.

I appreciate what you’re saying, that companies do things due to norms and markets (demand). I’m suggesting they also do things due to laws and architecture (Lessig, Code 2.0) and that we cannot rely on only one of the four to protect ourselves.