I actually was one of those developers, for a number of years. The reality is that we're still very far away from a robot that can visually identify random objects, identify them, and then pick them up in a safe manner. Humans are awesome at exactly that.
The automation is coming, yes, and many very tedious tasks are being automated but Amazon has never laid off warehouse employees because a robot replaced them- they just move those humans to jobs robots can't do yet, and grow faster.
The automation is coming, yes, and many very tedious tasks are being automated but Amazon has never laid off warehouse employees because a robot replaced them- they just move those humans to jobs robots can't do yet, and grow faster.