I don't think it matters, to be quite honest. Absolute tractability isn't relevant to what the analogy illustrates (that reality doesn't bend to whims). Consider:

- Locating water doesn't become more tractable because you are thirsty.

- Popping a balloon doesn't become more tractable because you like the sound.

- Readjusting my seat height doesn't become more tractable because it's uncomfortable.

The specific example I chose was for the purpose of being evocative, but is still precisely correct in providing an example of: presenting a wish for X as evidence of tractability of X is silly.

I object to any argument of the form: "Oh, but this wish is a medium wish and you're talking about a large wish. Totally different."

I hold that my position holds in the presence of small, medium, _or_ large wishes. For any kind of wish you'd like!