I don't disagree even a little bit. My position is that this fine is of a scale that has teeth at virtually every company in America. I remain frustrated, however, that people generally believe that an existential fine is called for, since the underlying conduct was not itself existential to Facebook.
If we passed a law outlawing targeted advertisement driven by behavior tracking, and Facebook ignored that law, a $20B fine would be reasonable to me. And I'd be OK with that law!