Because that’s not what sola scriptura means. The “sola” in sola scriptura indicates that scripture is - alone - the final norm. Councils, creeds and confessions are not equal to scripture but secondary to it. It does not mean other things are not useful, important, even critical.
Sola scriptura is the practice of the Church (Lutheran, in my case) of using scripture as the final norm, holding all teachers and teachings, doctrines and dogma accountable.
It does not, therefore, exclude teachers and teachings, doctrine and dogma. It does not exclude the pulpit or the mass, be it Lutheran or Catholic.
Further, scripture gives the Church the authority to teach, and teaching comes from the pulpit (and other places).
Jon