Expensive inspection – Where is the logic at the intervals?

Hello, I was at the first inspection today with speedometer stand 15,000, I paid 360 euros. The reason was in my opinion high amount, with the inspection intervals for my model. These foresee an inspection at 30,000 km or once a year. It can not be that the KIA then exchanges parts in the 3rd year, at only 45,000 km, although these are not worn out yet and with more intensive use otherwise only at 90,000. For this I have to be as customer every time The fact that the annual inspection is not necessary from a technical point of view, proves the fact that Kia only requires an inspection for new models for 2 years. How high is the cost of a 60,000 inspection? In addition, I am looking for a cheaper workshop in the vicinity of Frankfurt/mainal’s main car dealership in Raunheim. Thank you!