One relevant factor here is that the conscious mind is largely driven by subconscious beliefs in the first place, so the direction in which the conscious mind attempts to edit beliefs is often dysfunctional; see e.g. the part of your previous article that said:
People know intuitively where leverage points are.... Everyone is trying very hard to push it IN THE WRONG DIRECTION!
The desires we have to edit our inner leverage points are no different: a person who is a perfectionist will rarely work on editing themselves to be less perfectionistic, vs. trying to edit themselves to be better at not making mistakes.
Even in the case of trying to edit one's self to be "less perfectionistic", one is likely to approach it as something like, "How can I stop being upset over these stupid mistakes (so that I can get closer to being perfect sooner)?", not "How can I stop thinking mistakes mean I'm a shitty person?"
Conscious editing without first looking for background assumptions (like "mistakes = shitty person") will just be rearranging the furniture instead of actually moving house. But we don't consciously notice these background assumptions by default, because our brain doesn't attribute the problems we experience as a result of them, as having anything to do with them. We see surface symptoms and try to fix those symptoms, not question the underpinnings of our model of the world!
One way to deal with this is to always start with re-consolidating the more cognitively fused schema.
If you're trying to use a technique to be more perfect, first, use that same technique to question whether you should be more perfect.
Edit: Thought this would be better as a top-level comment.
There are other approaches too. Many people believe in using meditation to better integrate their thoughts and feelings and desires, for instance.
Worth noting that at least some styles of meditation can also make the problems hide. As with CFAR/CBT techniques, some of the issues get dissected and resolved, but others may just get reburied deeper.
One way to deal with this is to always start with re-consolidating the more cognitively fused schema.
If you're trying to use a technique to be more perfect, first, use that same technique to question whether you should be more perfect.
I've seen a worrying trend in people who've learned introspection and self-improvement methods from CFAR, or analogous ones from CBT. They make better life decisions, they calm their emotions in the moment. But they still look just as stressed as ever. They stamp out every internal conflict they can see, but it seems like there are more of them beyond the horizon of their self-awareness.
(I may have experienced this myself.)
One reason for this is that there's a danger with learning how to consciously notice and interact with one's subconscious thoughts/feelings/desires/fears: the conscious mind may not like what it sees, and try to edit the subconscious mind into one that pleases it.
The conscious mind might try, that is, but the subconscious is stronger. So, what actually happens?
The subconscious develops defense mechanisms.
Suppressed desires disguise themselves as being about other things, or they just overwhelm the conscious mind's willpower every now and then (and maybe fulfill themselves in a less healthy way than could otherwise be managed).
Suppressed thoughts become stealthy biases; certain conscious ideas or narratives get reinforced until they are practically unquestionable. So too with fears; a suppressed social fear is a good way to get a loud alarm that never stops.
Suppressed feelings hide themselves more thoroughly from the searchlight, so that one never consciously notices their meaning anymore, one just feels sad or angry or scared "for no reason" in certain situations.
At its worst, the conscious mind tries ever-harder to push back against these, further burning its rapport with the subconscious. I think of pastors who suppress their gay desires so hard that they vigorously denounce homosexuality and then sneak out for gay sex. They'd have been living such a happier life if they'd given up and acknowledged who they are, and what they want, years ago.
Now, sometimes people do have a strong desire that can't be satisfied in any healthy way. And that's just a brutal kind of life to life. But they would still do better by acknowledging that desire openly to themselves, than by trying to quash it and only hiding it.
How can we become more integrated between conscious and unconscious parts, and undo any damage we've already caused?
In my talk about the elephant and rider, I suggested (or gestured at) a few relevant things:
It's important to be gentle, to be curious, and to be patient. You don't have to resolve the whole thing; just acknowledging it respectfully can help the relationship grow.
There are other approaches too. Many people believe in using meditation to better integrate their thoughts and feelings and desires, for instance.
When you do something that you thought you didn't want to do, or when you're noticing an unexpected feeling, it's an opportunity for you. Don't push it away.