As to the CIA’s motives, who knows? Could have been time-sensitive, requiring removal of JFK at that time.
I was writing a response to the many people who claim that the CIA murdered JFK.
I pointed out that most of the executives in the CIA in 1963 were exactly like Jack Kennedy - smart, wealthy family, Ivy League diplomas, and center-left politics.
I asked why would they kill JFK and replace him with LBJ for five years?