One of the less discussed parts of Tuesday’s Democratic debate was the exchange that took place over automation and how to deal with it. But it’s worth focusing on that exchange, because it was interesting — by which I mean depressing. CNN’s Erin Burnett, one of the moderators, asked a bad question, and the debaters by and large — with the perhaps surprising exception of Bernie Sanders — gave pretty bad answers.

So let me make a plea to the Democrats: Please don’t go down the robot rabbit hole.

Burnett declared that a recent study shows that “about a quarter of U.S. jobs could be lost to automation in just the next 10 years.” What the study actually says is less alarming: It finds that a quarter of U.S. jobs will face “high exposure to automation over the next several decades.”

But if you think even that sounds bad, ask yourself the following question: When, in modern history, has something like that statement not been true?

After all, in the late 1940s America had about seven million farmers and around 12 million production workers in manufacturing. Machinery could and did take over much of the work those Americans were doing — and people at the time wondered where the new jobs would come from. If you think that concerns about automation are somehow new, bear in mind that Kurt Vonnegut’s novel “Player Piano,” envisioning a dystopian future in which machines have taken away all the jobs, was published in … 1952.