The simplest explanation fits all the facts.
The secret service, were forced to use a shit gun due to budget cuts. (This is clearly documented before the assassination. No woo involved). The issue they really hated was the hair trigger.
LHO fires. Lead secret service man instinctively turns towards the shot. (You can see where this is going). However his high powered rifle misfires in the direction of the motorcade and removes the top of JFKs skull.
One of LHOs shots goes into Governor Connally.
That's it. The inconsistencies of JFKs wounds with the pea shooter LHO had. The "magic" bullet that seemed to travel everywhere. The "second shooter" the Zapruder soundtrack alludes to. And then the obvious cover up as the government decide it's not a great look that their own parsimony resulted in POTUS becoming an ex-POTUS.
Subsequently the secret service were allowed to choose their own weapons. And on at least one occasion, LBJ stopped a motorcade and told the leading car to stay well in front.
Admittedly the illegal corpse snatching at gunpoint and botched autopsy don't help the cause of truth.
Hmmm. Government cost cutting leading to POTUS death. Could never happen now.
Elon Musk is 53.