But again, the context is not about humans trying very hard to stick to problems in "terminating space" when writing software, but about LLMs with no such compunctions/boundaries finding inputs that break "terminating space assumptions". (Whether or not you also believe that LLMs are capable of staying within the lines of "terminating space" when generating code.)

Generally speaking, yes, humans want to design programs as best they can in the world of safely terminating applications. Humans aren't perfect at it today, given practical real world data such as CVE databases. Trying to hope humans become perfect to safeguard the world against LLMs like the Googler quote way above is the thing I find futile. Humans aren't going to magically get perfect. We need good enough solutions more than we need perfect solutions. The fear is that LLMs can greatly outpace humans in breaking "good enough" than humans can keep up in building "good enough".