No
Remember I was talking about the ss agents and their failures including their inability to locate the sniper.
What
about their inability to locate the sniper? Do you really think these agents were superhuman? They had a lot to look at. They were surrounded by tall buildings with many windows and dense crowds of people, any one of which could instantly turn into a deadly threat. They only had a few seconds to do all this, while also keeping a close eye on the people they were supposed to protect.
Oswald was not so stupid as to not understand the importance of hiding from the agents until the last possible moment. He certainly would have known they were armed, and could and probably would shoot at him if they could find him. The longer he could keep them confused, the better. This could be why he waited until after the limo made the turn onto Elm Street, when the agents would turn away from him. It would take precious milliseconds to turn their heads to look for him, and in the process they would have to turn away from the people they were protecting.
After all, it
is easier to shoot someone in the back. That's why it's become a cliche of cowardice in so many westerns.
It would have been unreasonable to expect Oswald to stay totally hidden, of course. But he did pretty well; of the hundreds of witnesses in Dealy Plaza only a few actually saw him shoot. (But they were enough, along with all the other evidence, to tell us he did it.) They just happened to be in the right spot looking in the right direction at the right time. But they were not armed and they could not possibly have stopped Oswald. Only the agents counted, and Oswald did everything he could to hide himself from them for just a few more seconds. (Note that when you look down the barrel of a gun, it appears a little smaller than when you're looking at it in profile.)
As agent Clint Hill finally said, after many years of blaming himself into an alcoholic haze for not having prevented the assassination, on that day in Dallas all the advantages went to the shooter. There was simply nothing they could have done under the circumstances. And I think he was absolutely right. You will note that since that day, no American president has ever taken another open-air motorcade ride through a crowded city. Dallas demonstrated that it is simply not humanly possible to protect a president under those conditions.