Gradient boosting as a blind gradient descent

In the article, I'll show you that gradient boosting can be seen as a "blind" gradient descent. The gradient boosting pursues the same goal as the gradient descent, except it doesn't have a function for which we want to find a minimum, and yet the steps it takes can get you closer to it. That's what I mean by "blind". Gradient boosting optimizes the function which it doesn't see.