I don't doubt that there's tools with a lot more utility than Adobe's software provides when it comes to editing vocal takes and such, like the one you linked. And like you said, it's not really that bad of a process to do manually. At least not from the limited experience I've had of it. The main interest I had in what Adobe showed was the ability to type in new words and phrases that a person hasn't actually said and the software's ability to produce a somewhat realistic sounding take. That's the cool part for me, vs. the basic vocal adjustment capability.
That's because Adobe has had this latent voice recognition thing that they've been trying to do for a while so they can tag flash videos. It's why they came out with Story so they'd increase their corpus. My point is that the underlying technology Adobe is leveraging has been available for years from far better vendors using far better tools, it's just that nobody but Adobe would come up with a "let's fake news clippings" use for it.