No, I wouldn't say that at all. They were not hard shots, and he missed one of them completely. Shooter is trying to tell you they were easy shots. He knows. The most common reaction from people that visit the 6th floor and look out that window is suprise at how much closer it is than they thought and how easy the shots would be.
I've been there, and while I don't claim to be a master sniper, it's an eminently makeable shot. It's not that far, as you said, and Oswald had another thing working in his favor. Due to the layout of Dealey Plaza, when you see where JFK was when the shots were fired, the car carrying him would have been moving almost directly away from Oswald. Hence, almost no movement across the FOV.