Apple's pricing for a battery replacement - which I've never needed, and I tend to keep my devices for about three years - is about the same as the price of a new battery from a third-party vendor, and it comes from installation. I've had to replace two screens, and Apple's price is the same as the mall kiosk - and it'll be first-party parts, maintain the warranty, and my fingerprint sensor will still work right.

Apple devices (both laptops and phones) have a dramatically higher resale value than others, so that bit of your argument baffles me.