Why is the use of physical sticky notes a bottleneck for Agile or Kanban project planning?

They create a disconnect between physical artifacts and the digital project management databases

While physical notes are useful for initial brainstorming, they create a significant friction point in modern project management. Because these tools lack a native digital connection, any planning done on a whiteboard requires manual transcription into systems like Jira or Trello. This manual effort is tedious and prone to errors, and because it creates a delay between the physical planning session and the digital record, the actual project tracking is often disjointed and out of sync with the team's collaborative work.