In order to leverage EventLogging for pageview counts (media files in Media Viewer in particular), there needs to be a way to disable the default behavior of recording EventLogging events for a particular schema into the default SQL database. For this particular situation, the intermediary logs that are normally pumped into the DB are sufficient.
See this mailing list thread for some background: https://lists.wikimedia.org/pipermail/analytics/2015-January/003020.html