An up close shooting also makes for more eyewitnesses and easier apprehension of the shooter than a sniper does. There has never been any documented witnesses that actually saw Oswald pull the trigger. There were a shitload that saw Hinckley. Kind of hard to make a conspiracy out of the obvious.
In my local paper, on the 23rd, there was a small blurb within the bigger article that someone did see the rifle barrel sticking out the window and assumed it was Secret Service.
A bunch of people say Sirhan pull the trigger. Rosie Grier and some other jock whose name escapes me took him down. Tons of theories out there about that hit. Ditto with Bremer.
When they slow it down, you can see the gun firing in the Reagan job, and a couple of seconds later you can see him in the scrum of cops and Secret Service guys. But you never see him with the gun in hand.
Oswald had a lot of time between the shooting and the actual capture. He was seen in the breakroom at Texas Book, then possibly photographed leaving the building, next seen taking down the Dallas cop, then his rooming house, then the theatre. And there was "no way" the timeline could've worked. Which is all bullshit, because it not only assumes everyone is on synchronized watches, but it relies on eyewitness reports, which are notoriously inaccurate.