The Other Jazz Festival on September 8

Was it maliciousness or ignorance that led organizers of the 14th Street Jazz Festival to choose September 8 as the date of their event in the Power & Light District?  The date had long been held by the high-profile Prairie Village Jazz Festival.  (Here's my review.) Even so, the downtown event featured many of Kansas City's most talented musicians.  Had it been held on any other day, many of the 3,000 people who attended the festival in Prairie Village would have gladly supported the Power & Light District's event.  Thankfully, someone captured Bobby Watson sitting in with guitarist Will Matthews. Watson begins blowing at 7:13 in the embedded video.