“some brands of bikes” make frames out of carbon fiber with wireless derailleurs and have rear facing radar to detect when other bikes or vehicles are approaching, how fast, and on which side.
When your exercise, your recreation, your hobby, and your transportation are all the same thing, it’s easy to justify spending more to make those things as easy and pleasant as possible.
You can get a perfectly usable bike for very little money in America… Probably still made in China though 😂