> Or is "that's disturbing" somehow considered to be an indication of dismissal or disagreement?

Actually, you said "It disturbs me that all the examples so far are science fiction." which (a bit out of context and ignoring the principle of charity) could be interpreted as a cursory dismissal along the lines of, "these examples are too ridiculous to consider further".

Even with the principle of charity, I find "they're getting it from sci-fi movies" to be an unfair summary of my point, but perhaps I'm doing a poor job making my case clearly.

Thinking on it, would it be fair to expect any example of an autopilot function on a car to be from a type other than science fiction or fantasy?