Exactly, Oswald was put in place there prior to the trip by CIA operatives proving they were either culpably ignorant of LHO or complicit. There is no other reasonable explanation.
Several of the more recently released archives on the JFK assassination detail and document Oswald’s contact and workings with CIA operatives. That’s material that has been kept hidden for over half a century. And there is much more being with held for no legitimate reason but to hide the truth.
Oswald had been an unemployed drifter for quite a few years. He had no vehicle. How did he possibly come up with the means to travel to Russia or Mexico much less to sustain himself....
Oswald just got a job at the Book Depository to sustain Maria and the trip to Dallas was planned about three months after Oswald was working there. No conspiracy on that.