The Southern Baptist Convention, began, a most Baptist affiliations do, as a gathering together Baptist churches for the purpose of centralizing resources for the propagation of the Gospel around the world. Fast forward over a hundred years later, you will find a corporate conglomerate that dictates doctrine, that owns the largest publisher of Christian literature in world (viz. LifeWay Christian Resources), that operates its own Willow Tree figurine, VeggieTales, and The Shack distribution stores (viz. LifeWay Christian Stores), that possesses its own insurance agency (viz. Guidestone Financial Resources), that has created and owns its own translation of the Bible (viz. the Holman Christian Standard version), that owns and operates six American seminaries, and that does missions through the International and North American Mission Boards. This transformation is indicative of the shift in the SBC from its former role as the mere centralization of resources for the sake of the Gospel to its present role as a massive, bureaucratic entity that makes preaching the Gospel to the nations a great ordeal.
To understand the great difficulty that the SBC causes with regards to missions, one simply has to look at a decently sized Southern Baptist church. In those churches you might find missionaries who go through the International Mission Board into the nations, but you are likely to find a greater number being sent out directly by those churches thereby by-passing the IMB. The purpose is not that those churches desire to establish their own international identity apart from the IMB, but it is because the IMB has made the process of sending out missionaries so difficult that many who would desire to be missionaries have looked upon the IMB as a great barrier rather than as a great help. They look at the mandatory education requirements and the strict doctrinal conformities and then turn their backs on the IMB and its numerous hoops and look for other options.