Machine-made means a machine made it, not a person’s hands. Labels and shops set it against handmade: machine-made lace, machine-made pasta, machine-made paper. It does not by itself mean cheap or badly made. A machine-made thing is often very even, and that evenness can be the point. Though actually, a lot of things sold as handmade still touch a machine somewhere, so the tidy pair handmade / machine-made is tidier than factory life. The word is a calm, factual adjective. It is not rude.