Maybe you should do more research on this instead of misapplying a selected passage of scripture you can twist into your won context. I would be interested to see your evidence that the sound biblical preaching we see in churches is a failed teaching model. My church members would find it difficult to agree with you.
If you were in education or studied the history of education, you would understand. Attempting to teach to every level of understanding & maturity does not work. The content cannot meet the "milk" needs of the immature & the need for "meat" by the mature believers at the same time. This is a fact of any type of education.
I also base my view on the experience of being any many IFB & Missionary baptist churches. I've only known one pastor(not IFB or MB, just IB) who taught the meat of the Word from the pulpit; the rest were shallow, milk-laden denomination doctrine sermons. It was what I needed, but was too deep for new believers.
I don't know your members, but if they primarily obtain their spiritual nourishment form sermons, my 17yr old daughter could have he most seasoned among them saying "I'll ask my pastor & get back to you" within 5 questions.
The Great Lie of our day is that believers need the mediation of a religious leader(priestly pastor) for their spiritual growth. This is antithetical to the gospel or Christ & the New Covenant & is one of Satan's greatest deceptions. Believers need qualified teachers who can study & teach the Word without personal, experiential, or denominational bias; not self-authoritative sermonologists.
