In the 1960's, the CIA were engaging in dirty tricks of setting up soviet officers with prostitutes, then filming them in bed, and then threatening to show the footage to their wives if they did not pass on secret information to them.
It seems to me that if the CIA wanted to get rid of JFK, they would have just gone down this route. Film him in bed on one of his many escapades, and then release this footage to the press. This would have derailed his 1964 campaign, making it more likely the pro-war Richard Nixon would have been made president, and in this way the CIA/military industrial complex would get to continue and ramp up the Vietnam war.
So why would the CIA/military industrial complex go to all the complex trouble of assassinating JFK and setting up a patsy (i.e Oswald) and altering this autopsy footage/x-rays rather than simply film JFK in bed with someone and then release that to the press?
I don't think there is a good answer to that other than the CIA/military industrial complex had nothing to do with what happened in Dealey Plaza.
The problem with your theory is the Press and other insiders knew of Kennedy’s (and lots of other politicians’) sexual escapades yet kept quiet about it.
Even though lots of politicians had affairs and other gossip worthy stuff in their personal lives, there were no big political sex scandals until the 1980s. It’s sort of a modern media thing.
So what makes you so sure that the Press in the 1960s would’ve reported on that stuff?
The CIA definitely used blackmail but most of the time it was the more embarrassing stuff. Like homosexuality or pedophilia. As we all know, it wasn’t socially acceptable to be Gay in the 1950s and 60s.