The problem
Personas are supposed to ground product decisions in a real user's reality. A persona built from actual research — interview quotes, behavioral data, observed workflows — is worth having. A persona built from assumptions and stock photos is decoration.
The problem with most persona documentation isn't the research — it's the format. Persona docs in Notion or Confluence become static pages that get viewed on week one and never again. They're usually formatted like marketing copy — padded with demographic details that don't affect product decisions and light on the behavioral specifics that do.
A persona built on a whiteboard — where the team is forced to write only what they know and what matters — is usually more honest and more useful than one written in a template. The whiteboard forces compression. You can't write three paragraphs about the persona's morning routine when you only have half a column to work with.