Assalamu alaikum

Thank you for this contact. This hadith is authentic. The reason as I understand is to provide YUSR (ease&facility) which is the very spirit of the faith of Islam. Since this hadith doesn't indicate that the Prophet did it rutinely rather only one time, it cannot be taken or interpreted as the symble of general practice. Many ulama interprete it as the speciality of the Prophet not related to anyone else. But this view is weak.

Wassalam