They're written on the conviction that the word of God is living and active, capable of destroying nations, of creating universes, of awakening the soul, of raising the dead, of exposing motives and of causing God-glorifying transformation. To come to the word of God to simply learn is to miss the point. We come to taste and see that which is more precious than gold. Come and gaze on glory!
Undoubtedly they're not the best studies the world has ever seen, but if they can be of some service to the wider church then that's great. They're not really designed to be used straight off the page, but intentionally written to require some extra preparation by the leader. They're a tool to lead you to worship Jesus in his word. Feel free to edit and adapt but not sell them.