Just to understand the baseline you're working form, what data are you drawing on when stating what's "normal"? It has appeared to me throughout this conversation that you are starting from the assumption that your internal experience (at least, with regard to mental imagery) is consistent with the majority and making assertions about the majority based on that.
If you are actually drawing on a larger amount of data, specifically pertaining to the mechanisms of people's internal experiences, that'd be useful to know. If you are not, I'd gently suggest that you're working from a flawed statistical assumption, and that looking at the numerous interactions in this thread where people describe materially different internal experiences ("I can only recall tastes in terms of descriptors" - "I can experience a taste by imagining it"[0]) may be more informative without presuming universal consistency.
If you are actually drawing on a larger amount of data, specifically pertaining to the mechanisms of people's internal experiences, that'd be useful to know. If you are not, I'd gently suggest that you're working from a flawed statistical assumption, and that looking at the numerous interactions in this thread where people describe materially different internal experiences ("I can only recall tastes in terms of descriptors" - "I can experience a taste by imagining it"[0]) may be more informative without presuming universal consistency.
[0] https://news.ycombinator.com/item?id=40764813