Imaam Abu Al Muzafffar Al Sam’ani رحم الله said:

The people of the sunnah say, ‘The foundation of the religion is following ittibā (the sunnah of the Prophet ﷺ)

and the intellect is subservient. So if the foundation of the religion was left to the intellect, the creation would have been in no need of Revelation, nor of Prophets, and the commands & prohibitions would have no meaning, and anyone could have said whatever he wanted.

Al – Hujjah ( 85/a )