None of the witnesses who saw the shooter definitively ID’d Oswald or placed blame on him. Most of his coworkers’ testimonies suggest that they only saw him go upstairs alone during the motorcade, or leaving after JFK is shot. It seems a bit silly to have this complex conspiracy and not coerce or stage a single testimony that says with 100% conviction “yup I saw Mr. Oswald on top aiming his sniper rifle right down at the president” if your goal is to frame an innocent man
Your reasoning seems pretty backwards, “there’s no evidence he did it, so he probably did” is what your comment reads like.
The reasoning that “the CIA carried out a complex assassination plot and failed to place witnesses to implicate a patsy” is dumber