Earlier quoted context omitted.
The poster probably referred reliability as an ethical value; direct choice in building the system as an ethical value because embedded with your decisions hence responsibility; and conversely proposing "black-boxes" as an ethical fault. There are several possible reasons for this latter: not only that you should not be contented until you "could warranty" for "your" system, but also the possible outcomes. For exampl…
My immediate thought is that the ethical concerns with facial recognition in policing are orthogonal to the "kind" of AI involved. Clearly, our industry has moved to other techniques and my guess is because they're more capable. And so it comes down to regulating and adding accountability for the applications of the technology.
Suppose one AI that deterministically determines an output and is stress tested for reliability, and suppose one that hallucinates an output, maybe through statistical reconstruction of detail. The ethics there would not be orthogonal at all.
> my guess is because they're more capable
That '«capable»' you used there is a hive. You could have guesses many more reasons, such as "we can hence we do".