What benefit is my advanced knowledge of theology to the world, to the church or even to myself?

I have average intelligence in most realms of existence…

I am able to interpret scripture at a phd level… I think I have the brains to get a phd in theology of harvard divinity school…

But other than getting a phd from harvard divinity school… what benefit is it to me… if I understand every verse in the bible?

A Phd in Theology from Harvard is no easy task. Most people could not get past the Greek, Hebrew, and Latin. The long English words are even a different language. But if you earned a Phd from Harvard, you could get your books published and be a professor of theology.
No one understands every verse in the Bible. But if you have a good understanding of the New Testament, that is enough.