There are some brands of bicycles that can cost more than the down payment on a car. Why? Surely making a bike lightweight and reliable isn’t so difficult that it warrants that price? Is it just the brand name or maybe it has to do with customization options?
Same way as high-end sports cars can cost hundreds of thousands or even millions.
Regular commuters are cheap, you can get perfectly good 2nd hand bike for a pocket money, but a high-end enduro bike with state-of-art parts and exotic materials can cost you over 10k.