Because You Wear It, Apple Watch Oxidizes

Oxidation has started to appear on the bottom of my Apple Watch Series 6 GPS, a product I purchased on 01.06.2021. I scheduled an appointment with Apple at Zorlu Center, where they informed me that this oxidation was considered a user error and I would be charged 5,000 TL for a replacement. Essentially, they are implying that it's my fault as a user for wearing the watch, and if it's not on my wrist, there won't be any oxidation issues. It's disheartening to realize that a product I bought just two years ago has become practically worthless. Unfortunately, there's nothing more to say after receiving such a response from a renowned international company.