Sure, we can agree it's exponential until it's not. And then we can start to think about whether it's going to be a logistic curve or oscillate and what factor

Sure, we can agree it's exponential until it's not. And then we can start to think about whether it's going to be a logistic curve or oscillate and what factors might amplify or damp and our model is much more interesting. Like, the original statement is about systems that people study and model, and how the exponential condition can really only exist for brief periods relative to the lifetime of almost all systems of interest.