Why doesn't anyone make a polisher?

Polishing machine is a kind of work of foundry. First, there is no technology, no technical content at all. The main thing is to clean the used boxes and remove the sand. There is also the filing and deburring of the corners of newly cast castings, and some of them are thrown down by polishing machines. Second, dirty, dealing with sand and cast iron slag all day, itchy all over. Third, if you are tired, move the workpiece around, up and down (polishing) and so on. Saunders, some factories are called sand cleaners and some are called wool finishers. In a word, many people don't like this job.