The JFKA hobby/industry is fueled by a desire people have to want a more interesting answer than that some little nobody named Lee Harvey Oswald learned the POTUS was going to be riding past his workplace in a slow moving open top car and decided to take advantage of a once in a lifetime opportunity to become somebody famous. For maybe the first time in his life he succeeded.
The fact is that JFK's fondness for appearing in public before adoring crowds riding in a slow moving open top limo made him an inviting target for a malcontent like Oswald. It was JFK's bad luck that his motorcade by random chance got routed right past that malcontent's workplace making it very easy for him. If it hadn't happened in Dallas, it might have been some other little loser in some other city who took advantage of JFK's willingness to expose himself to danger.
For some reason, people don't want to accept the obvious answer, the answer the DPD had come to on day one. I was in 7th grade in Omaha on that day was in math class, our first period after lunch when our principal made the announcement over the loudspeaker that the President and the Governor had been shot in Texas. Our teacher, Sister Gerald, immediately turned on her radio. It seem like just a short time later the announcement was made that JFK had died. Classes were called off for the day and we all went across the street to the church where Father Evans led us all in praying a rosary. We were then dismissed and I went home. I was surprised when a short time after that, I learned the suspect was already in custody. That's when I learned he had also killed a cop. I knew nothing about the details of the assassination but from the moment I saw Oswald on TV, I never had any doubt he was the assassin. Even when I was briefly brought over to the CT side, I never doubted Oswald was the gunman, even when I believed there was a second gunman.
A CBS documentary in 1988 was the first time I learned some of the basic details of the assassination. The layout of Dealey Plaza, the motorcade route through it, and the position of the TSBD. It was the first time I saw the Z-film. That's when I really started to study the JFKA and learned more than just the basics of it. The more I learned, the more I became convinced Oswald was the one and only gunman and that there was no credible evidence he had even a single accomplice. I continue to hold that belief almost 40 years later.