Perhaps some people like watching them?
Until a good friend of mine had a kid who loved watching garbage Truck videos on youtube, I had no idea such things exist.... Seriously, Search Garbage trucks on youtubes. Hundreds of videos of Garbage trucks picking up trash cars and dumping them into the bin.....
2007 VStar 1300 Touring (road trip/weekend bike)
2003 FZ-1 (daily commuter)