Instead of complaining why don’t you study up on the rooftop Shooter? In 1975 they found a 30.06 shell casing when repairing the roof. On the day of the shooting there’s a couple of FBI or detectives picking up a 30.06 round that landed in the grass by a manhole across from the grassy knoll.
As I read your comment, I’m watching the X Files episode “Musings Of A Cigarette Smoking Man” which has Oswald buying a root beer from a malfunctioning machine in the depository while CSM takes the shot from a drainage hole.
Synchronicity.
Ah yes, the invisible shooters that no one could see.