The questioner is correct in that the message noted above was unintentionally misleading. I apologize for not being clearer in how I worded the message.
My intent had been to highlight that a lack of specific department and/or disciplinary specific criteria (guidelines) on which to judge applicants for promotion and tenure make resulting evaluations prone to unstandardized and non-contextualized judgments. Without guidelines that elucidate what faculty know to be the most important aspects of their teaching, their scholarship, and their service, evaluations of their respective performance are more at the whim of others—including the ultimate decision makers in the administration. Similarly, a lack of department-specific guidelines may result in greater administrative autonomy and subjectivity in making evaluative judgments of a candidate’s overall performance.