I don't even know what point you're trying to make, but regardless, I think the point the poster you're responding to is making is that there are two places in the scientific method where anecdotes comes into the play: observation and hypothesis. These are the seeds for follow-up inquiry and the basis for the scientific method.

Moreover, it's completely reasonable to be skeptical of the methodology of a study, especially when one of the subject groups is as specific as a religious group doing a fast as part of a religious observance.