The customers care about the quality of a bike repair. They will pay more for a better repair, and will not return to someone who does a shoddy repair.

The owner, and probably user, of a bike is the person paying for the repair. It is to their advantage to ensure it is a good repair.

People expect a repair will be good, and will blame the person who repaired it if not. With software people often blame themselves for issues, and they have no expectation of quality. They also cannot tell quality until after they are committed to using it. Bike shops do not benefit from vendor lock-in.