Shipping-center automation is going to move people out of rote jobs in the same way that farm automation sent a lot of workers off the land. From this story, it sounds as if the people working at Amazon shipping centers have found mildly more palatable jobs that could lead (with more training) to better paying careers in industrial operations, design, etc.
We can (and should!) argue about how fast "better" jobs are taking shape. We can explore ways of making that happen more systematically so that children of pallet stackers have a brighter future. But it's a dim world if we think rote labor like pallet stacking ought to be preserved as long as possible.