Your other points I think relate to scale. No advice can be universal, and if you read the article as absolutist, your take makes sense. If you read it as "hey, your mix is likely wrong", a lot of the criticism fades.
I think we've lost a bit of creativity in marketing. The Lego movie example is a really good one. I think it is probably good this happened, as a lot of creativity was performative (how do I win an ad award/impress my peers) and not about increasing sales, but we've perhaps shifted the balance too far, and there is likely some areas with good ROS that are now better bets.