Not defending indeed. I just had a frustrating experience where Apple refused to repair the 2 manufacturing defects on my MacBook Pro for free (which they said they would on their website [0] [1]), claiming there was corrosion found on the logic board. There is no option for only paying for the part they purportedly said you are responsible for. You have to pay for their malfunctioning parts if they say you should.
[0] https://support.apple.com/en-hk/13-inch-macbook-pro-display-... [1] https://support.apple.com/en-hk/13inch-macbookpro-battery-re...