Has anyone found an answer to this question until today?
I also encountered the same problem, and I wondered the same thing.
Could it all be derived from the fact that more access points are needed to get useful information for the analytics?
Even using third-party tools such as those listed in the link shared by @colo I imagine the use of multiple APs is required, even if this is not specified.
Maybe @Lewis, as in my case, had only one AP available?