Suggest reading "Dr. Mary and the Monkey" and you will see how Utilitarian MO's fashion ugly realities. (JFK assassination is the 'side' story; but Oswald and CIA/mafia/Castro et al elements - New Orleans and Dallas, very much a part of it.)
If all so innocent here; why were records sealed for another, however many years? There is a legitimate record of facts out there; but those most pertinent, are not being shared by our Gov and won't be; at least, not during lifetime of those alive and impacted; by JFK's assassination.
47 years of conspiracy theories have been based on "proving" that Oswald could not have been the lone gunman, and inferring a conspiracy from that. Proving that Oswald was the only shooter does not eliminate the possibility of a conspiracy; there's just the inconvenient lack of evidence of a conspiracy.
I could believe that my computer is run by magic pixies that translate my keyboard input to the screen and scurry off to post my message to FR. You could sit down with me and patiently explain all the electronics involved, and I could be wholly satisfied that they explain the phenomenon. That still does not prove that there are no magic pixies.