Oh! I see; he was only incompetent on the assassination weekend. That makes your argument so much more robust. NOT.
I really don't understand the point you're trying to make
We are getting off-topic.
However ... Jesse Curry did not believe there was a conspiracy to kill JFK while he was Chief of Police in Dallas (until 1966). From Oswald's death to his (Curry's) retirement, he never mentioned a belief that there was a conspiracy to assassinate JFK.
Only when he wrote a book about the assassination in 1969--presumably to make money--did he claim doubts that Oswald was the assassin of JFK.
Curry's responsibility was to ensure the safe transfer of Lee Harvey Oswald from the City to the County Jail. Oswald was murdered while in custody of the Dallas PD. Chief Jesse Curry was incompetent.