The solution is simple: understand what the tool actually does before declaring it impossible to use. But then again, reading documentation requires... what's the word... effort.

Claude Code stores feedback transcripts for only 30 days and has "clear policies against using feedback for model training":

  Privacy safeguards
  We have implemented several safeguards to protect your data, including limited retention periods for sensitive information, restricted access to user session data, and clear policies against using feedback for model training.