I take a slightly different route, but I am with you on this in concept. It is my belief that the delusions we are drawn to, and especially the ones that we hold onto tightly or experience repetitively, are significant in some way.

When mine come up, I recognize them as delusions, but I do not just dismiss them. I try to see what they might mean symbolically. My subconscious is holding onto the belief, so I approach working with it in the language of the subconscious. I think your method of working with the belief to consciously 'know' it in a reality based setting is a beautiful idea. It can give the experience meaning and purpose and then perhaps one day unlock the 'why' which is what we need to discover.

Blue, about the definition of delusion... Take a point in time approach to it. What I hold as a delusion for a period of time can later be identified as a false belief. It is more of a state of consciousness thing to me. In one state, I 100% without any shred of doubt held these beliefs. They were truly fixed. Later, I moved into a more combined reality state and saw myself through other lenses and realized those beliefs were false.