1؎ : Because this is an occasion for warning and intimidation, in which severity and strictness are required, and this explanation does not contain that.
Explanation & Benefits
Shaykh Umar Farooq Saeedi
Benefits and Issues: The meaning of [لیس منا] is "not from among us." And the meaning of [لیس مثلنا] is "not like us and not similar to us." And the purport of the statement of Imam Sufyan rahimahullah is that severity and strictness are beneficial for warning against and preventing wrongful actions; therefore, one should never render the words of the Prophet sallallahu alayhi wa sallam in a soft or gentle manner. These words should be conveyed exactly as they were spoken.
Source: Sunan Abu Dawood – Commentary by Shaykh Umar Farooq Saeedi, Page: 3453