I'd say that CTers keep more of an open mind about the many possibilities that present themselves when one sifts through all this stuff.
I think that because you've had an "epiphany" in realising this Lance is a very good illustration of the tunnel vision of a typical LNer fan.
I myself remain wobbling on the fence. One day I can read something that sways to the lone nut, the next day, something else sends me swaying back the other way.
Remember that Gerald Ford told the president of France that they knew that there had been a conspiracy but hadn't been able to find out who was involved. Of course LNer tunnel vision will say as usual "The French president didn't understand English well enough" etc. 
Your theory won't quite work insofar as Lance is concerned. I know him pretty well.
From approximately 1975 to maybe 2010, I read NOTHING BUT conspiracy literature. The reason is somewhat humorous. An avid reader in all areas of Weirdness, I received every month a massive newspaper-sized offering from Edward R. Hamilton, Bookseller. They offered hardback books on all subjects at staggering discounts - $25 books for $3. Every month I had a substantial box coming my way. They had tons of JFK material - ALL CT-oriented because it apparently didn't sell and could be had for $2 or $3. I read EVERYTHING. There was a point at which David Lifton, whom I now regard as certifiably insane, actually made sort of a Gee Whiz sense to me. That's how far into the Conspiracy Ozone I was.
When the internet became a reality, I was a Gee Whiz conspiracy enthusiast. On any number of forums, I questioned how any fool could possibly believe the JFKA was ANYTHING BUT a conspiracy. My first posts on the Ed Forum - I can't recall exactly when that was, but perhaps 2016 - were solidly in the conspiracy vein. Not whacked-out CTer because I'm simply not whacked-out, but solidly CT-oriented. Like most CTers, I had no coherent theory - but by God there OBVIOUSLY had to have been an elaborate conspiracy and cover-up.
I fully retired at the end of 2017, having spent 40 years writing complex motions and appellate briefs, doing in-depth research, understanding the nuances of evidence, and honing my critical-thinking skills as I poked holes in other lawyers' arguments and defended my own. I also developed a strong interest in epistemology, which eventually led me to the vast body of psychological and sociological literature regarding the conspiracy-prone mindset. In that literature, I recognized MYSELF to some extent. This was true insofar as the JFKA, UFOs and lots of other areas of Weirdness were concerned.
Over the past roughly 7-8 years, I have been STEEPED in the JFKA. I have read materials that I guarantee you 99% of JFKA enthusiasts haven't read. (I started with the massive writings of Walt Brown - his JFK chronology alone being over a million words - and
Harvey & Lee because Brown recommended it, if only for the staggering amount of research Armstrong had done.) Thanks to what I describe in the preceding paragraph, the scales gradually fell from my eyes. I realized Conspiracy World is fundamentally - yes - NUTS. The Lone Nut narrative, with all its defects, is FAR more plausible and, perhaps most significant to me, far more consistent with Oswald the actual man. I now guard against my own conspiracy-prone mindset and exercise my lawyerly critical-thinking skills to insist upon the best evidence, the most reasonable inferences, and the most plausible conclusions.
I have utterly no emotional or quasi-religious attachment to the Lone Nut narrative. If presented with genuinely compelling evidence, I would cheerfully return to Conspiracy World in a heartbeat. The fact is, however, to date there has been no such evidence and what passes for Conspiracy Thinking on forums such as this is, to be blunt, almost entirely unadulterated crap and pointless mental masturbation. As I've said before, I find the bizarre psychology and dynamics of forums such as this far more interesting - an epistemologist's field day! - than anything that is actually said about the JFKA.
"Tunnel vision of the typical LN fan"? Uh, not exactly.
