I understand and respect your passion for pool. I have non-pool-playing friends that occasionally ask, "Do you still play pool?" I smile and say yes, but in my head I'm saying, "Hell yes! Why would I ever stop!" Lol. I have pool-playing friends that can't believe I've never lost my passion for playing, not once in 30+ years. So I truly understand where you are coming from.
I think what creates skepticism when it comes to CTE is the fact you admittedly have been obsessed with getting to the heart of it, spending years and years trying to perfect and analyze the workings of it. Such a timeframe gives one the idea that maybe you've programmed your brain to eventually make the system work, and that's why there's a learning curve for newbies that begin the CTE journey. It may just be that reprogramming the brain to see things differently as you say, is what takes the most work/time. I can see that. But I can also see the skeptical side, thinking maybe that what you consider objective is actually years of subjective training that eventually came to feel objective to you, though new players lack your sense of objectivity because they haven't developed it yet through their own subjective process.
Regardless of tag words such as "objective" or "subjective", any aiming method can become as automatic as turning a door knob if a player dedicates the practice time. So I have no doubts that CTE works excellent for those who devote themselves to it.