Earlier quoted context omitted.
There are plenty of places [1] where garbage is sorted for free by poor people who scrape a living from recycling it. Sorting garbage is a terrible job for humans, but it's a terrible one for robots too. Those fancy mechanical actuators etc are not going to stand up well to garbage that's regularly saturated with liquids, oil, grease, vomit, feces, dead animals, etc. [1] https://loe.org/shows/segments.html?programID=…
are you implying that society shouldn't aim to reduce human interaction with vomit, feces, and dead animals? Robotics in harsh environments isn't unheard of
An example: A friend worked on accurate built-in weighing machines for trucks, which could measure axle weight and load balance to meet compliance for bridges and other purposes. He found it almost impossible to make units which could withstand the torrents of chemical and biological wet materials which regularly leak into a truck. You would think "potting" electronics understands this problem but even that turns out to have severe limits. It's just hard to find materials which function well subjected to a range of chemicals. Stuff which is flexible is especially prone to risks here: the way you make things flex is to use softeners, which in turn make the material for other reasons have other properties like porosity, or being subject to attack by some combinations of acid and alkalai.
These units had NO MOVING PARTS because they were force tranducers. They still routinely failed in service.
Rubbish includes bleaches, acids, complex organics, grease, petrochemicals, waxes, catalyst materials, electricity, reactive surfaces, abrasives, sharp edges..
They are not saying "dont try" they are saying "don't be surprised if it doesn't work at scale, over time"