Philosophy warning: I don't know if there is a term for it, or if a philosopher/etc. has written about this phenomenon, but: a noticeable trend to me is what I'll call "the replacement of ethical expectations with specific, written down laws." Rather than expecting a human being to behave in certain ways intrinsically (i.e., normative ethics ) we tend to assume they will behave in the worst way possible, and then pas…
There are already laws against theft. They apply to vehicles, secure and insecure alike.
A law mandating a minimum level of security, as GP suggests, seems to me to fit the suggestion, that auto manufacturers have a minimum standard to ethically sell a vehicle which buyers would, presumably, expect to have locking mechanisms suitable to prevent theft.