Why shouldn't it be highly voted? When you're talking to a random outsider, and want to demonstrate the usefulness of bayesian techniques, using the example of clippy is a funny, and interesting, way to make your point.

As such, this is a valuable contribution for anyone who might, at some point, want to convert someone to bayesian techniques.

Given that it takes very little time to read, this means that it's value:time ratio is very good. As it is a discussion post, rather than a main post, this is sufficient justification to upvote it.*

*(with a main post I'd also expect a significant amount of content)