Prior to 2016 I agree that they didn't have the requisite talent since they obviously didn't have a franchise QB. However, 2016 is the watershed year that pretty much makes the case for proponents that new hotshot coaches are the primary key to a quick turnaround.
One can rationalize Goff not being ready all they want but the optics of the dramatic turnaround from 2016's terrible record, the leagues worst offense and Goff looking horrible to 2017's playoffs, the leagues best offense and Goff looking awesome is just too much evidence to overcome. The fact is, no one expected the turnaround to be that stark, even among people who knew the team had a lot of talent - you and I being in this latter group.
I believe there were even reports that the Rams surpassed even Demoff's and Snead's expectations.
If McCarthy is a hot coaching candidate, that's understandable given that he is a winning coach. I'll grant that that would be a bit of evidence that somewhat contradicts a portion of what the article above is selling but I don't believe the article or Cowherd were saying that an energetic, innovative, offensive genius is the ONLY type of coach that will be in demand.
Besides, the main thing the article was selling wasn't that only one type of coach will be in demand; it was that these new innovative coaches and the dramatic turnarounds they've engineered have raised expectations on how quickly teams can turn things around.
