Take the deadlift and make it explosive. Accomplish a functional task.
You have to push stuff. Simple.
Can't climb and you can push if you don't have the pulls. Always important for balance and health, in some sports equal to or greater than the push.
You gotta work son. And you gotta travel distance fast. This to me is the real eye opener for some. In a evolutionary sense, someone whose sprint capacity declines or doesn't exist is prey. EASY PREY.
Sometimes I think of the TGU as a novelty, but whatever it's true functionality really is, the skills and strengths learned in it's practice are real.