No that isn't all YouTube does thank you very much. It's one of the greatest treasure troves of educational video content. It has helped my life, career, and those of my friends. It has probably contributed far more to humanity's advance, in efficiency alone, than most other websites of its kind.
That you only use it to watch videos that bring zero gain to your life is a You problem.
That you only use it to watch videos that bring zero gain to your life is a You problem.