The main advantage is learning to relate green beer to the final product. Occasionally, you'll decide to make an adjustment while the beer is green, such as drying it out a little with some dextrose or adding body with MD.
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"
"I would like to die on Mars, just not on impact." Elon Musk