I'm amazed we even still have call centres. Most of the human workforce is just puppetry driven by workflow scripts. Working in one was the single most dehumanising experience of my life, and I was the one implementing the workflows. I agree that they are absolutely a huge target for automation - I can't think of a single step in the entire workflow between campaign conception through to deployment and associated follow up (document fulfilment, etc) that couldn't be made more efficient and frankly more humane with massive automation. And that's without any kind of ML/AI in the picture. Once you start throwing AI around I reckon you can skip up a whole skill tier from there. In this case, I for one welcome our new robot overlords.