What he meant was that they (being fresh out of school) don't know what statistical work for
business is. They can crunch numbers, but they don't actually know what questions they need to be answering for their employers. And their employers don't really know what's needed either, just that they need a statistician. So they end up doing number crunching on the computers, which is all fine and good, but of relatively low value. Additionally, and many who have programmed can attest to this, computers offer an emotional satisfaction when you work with them: Oh, cool, I finished this neat Travis CI integration so now my workflow is more automated. But I spent two weeks doing that and what value have I added to the business? (Not that automation is bad, but people get distracted by the side problems and not the core problem.)
Of course things have changed, you don't have to invent your own statistical packages anymore. But see some comments elsewhere in this post: People are saying that the data scientists are the ones that know process automation better than anyone else in their offices. The ones who best understand docker and continuous integration. This leads to a question: Why are they so good at that? Is it because it's solving real problems for them and letting them be more effective? Or are they like every "data scientist" in the last couple offices I worked in: They have no real work to do because no one knows what's expected of them, so they solve interesting (to them) problems rather than business problems.
I'm not trying to knock the whole field, but it's a trend we've seen play out before. Smart companies and smart people figure out that they need X. Or they discover a technique or process that works well (see devops). They do it, they create a position called Xian or X Scientist or X Analyst. Now everyone wants to be like the successful guys and start imitating, without comprehending the value or purpose of the work or process. Lots of people take on the new title, schools offer courses in the techniques they use, but with a poor emphasis (due to time or their own lack of understanding) on the business case for it.
The current trend with data scientist is no different. There's positive value when it's understood, and negative value when it's not (best worst case: just an extra body being fed but doing no harm to the business other than the cost of their salary).