To add my pet theory, it's a attractive to kids because it's an immediately understandable job. "Pick up all the rubbish, put it in the truck, press the button,

To add my pet theory, it's a attractive to kids because it's an immediately understandable job. "Pick up all the rubbish, put it in the truck, press the button, move on". You can imagine a kid watching the whole routine and feeling like they understand every part of it, the wider context and the minutiae. The classic "what do you want to be when you grow up" responses (Firefighter, Police, Doctor, Chef, etc.) all have that property of being immediately relatable.