Its a toxic, anti-enlightenment culture, if any question or request for information is perceived as a attack on the self-worth of the author of that piece of information. I think at the root of this perfectionism, are loads of damaged individuals, whos whole identity and self-worth is defined via their work, their code, their child of mind.

There are so many of these, that they can become a culture majority and bring whole projects to a stop. When i encounter these, i tend to isolate them, link up with other reasonable people (who usually also work around them. If they have grown to powerful, you build two versions, one with their "architecture" (which they will inevitable grab and sink years of time into) and one that will be actually shipped, as a emergency solution.

If discussion is not possible, double the project estimate, cause there are two now.