I think your implicitly getting at something here. Both are dealing with an inferiority/superiority dynamic. The suggestion of a group you identify as being less, causes a predictable reaction to characterize the other (non-aphantasia) as problematic/hallucinating (i.e. broken/lacking). This ties back to the post where the author speaks of feelings of inadequacy (shame, etc...) about being unable to visualize, again signs of an inferiority complex. While such complexes may be traced back to particular memories or events, they're also habits of thought which are common place and culturally reinforced, so much so that they seem quite normal. For example, the culture of idol worship, like raising up of tech heroes while implicitly lowering your own self worth, which happens often on this site.

The fact that the author doesn't mention the details of the memory or events of the day also suggests shame and concerns of being judged for them.

The good news is they are writing about their struggles which suggests their willingness to work with these fears.

I think the answer probably isn't about pretending you're not better or worse, but accepting that being better or worse at something doesn't change your inherent self worth. Accepting that your not in control of many of your conditions and conditioning can free the mind from a sense of guilt and the fear around judgement of yourself and others. Hopefully this helps the author and those who struggle with notions of identity and self worth.