It could not have been a better fit. The water flowed from the throne of Ezekiel's temple, which could not have had literal fulfillment because they would have had to build it on a spring and they didn't.
Later during the same meeting, the Bible Study covered all the schools held throughout the organization. Comments thinned out as the study progressed because nobody had gone to the latter schools so they had nothing to say off the top of their heads.
Okay? The water is the 'life-giving' spiritual food. And where is it more manifest in the schools, some available to all and some more specialized? Yet the schedule for the Bible Study is months old. The schedule for the Bible reading? Maybe a century, as it is 'wash, rinse, and repeat.'