"Cover up" has evil connotations ala Watergate, etc.,. The press knew Kennedy was in constant pain-this was not a recreational thing. He began his addiction early on and things were impacted by his military service. The press knew this. Yes, Camelot was a farce as is much of the Kennedy legend. The supposed "Kennedy Curse" is more Kennedy arrogance such as skiing while drunk even after being warned, flying a plane that is too much to handle even after your flight instructor tells you not to, etc.,.
And talking about deception. Jimmy Carter came off as Mr. Niceguy, but his reputation via secret service agents was that he was the biggest asshole of them all.
Getting back to the original question, I guarded JFK and Trump is no JFK.