Skoda India — Front brake discs worn out at 9.7k kms

My car running is 9707 kms now and my car steering vibrates while braking. When complained about the same, service department at the dealer is advising to change the front discs as they are worn out. Usually discs should last longer. These discs are not covered under warranty as they claim them as wear & tear parts. Why the company has fitted such poor quality parts? It’s a matter of safety of passengers. This issue is observed after first free service (25-Sep-2021) at 8779 kms. During service it was not brought to notice about brake discs worn out. Suddenly in 1000 kms how will they wear out?