The repair is not $69. That one is purely for battery replacement in an otherwise-intact phone.

Screen replacements are more expensive, but the worst is actually damage that's neither the screen nor the battery - for example just a scratch on the housing or a cracked back glass are actually the most expensive options (even though said housing on eBay is around 20 bucks).

Similarly, water damage can usually be fixed by just cleaning the board and replacing a few mainboard components - that's something Apple will outright not do (good luck if you have valuable data on the device), and yet there's clearly a business there as both Louis Rossmann and Jessa Jones (from iPad Rehab) have been able to build profitable businesses on it.

> I can’t see how Apple can make a net profit on the repair itself at $69 for modern phones, so the profit motive/outcome must come from tilting people towards replacing a phone with a trade-in credit.

Apple could probably sell the devices at a loss and still make money overall on App Store commissions.