We haven't solved the "bendable glass" problem yet, so foldable displays are made of soft plastic which is extremely easy to damage compared to the toughened glass you're accustomed to. You can put a permanent dent in them with your fingernail if you're not careful.

Had my Samsung fold3 a full year now, the foldable screen is surprisingly still as good as new

An iPad have no moving mechanical parts, and are in an aluminum body that doesn't flex.

Iphone 6 says hi https://www.extremetech.com/mobile/270055-documents-reveal-a...

apple decided to use a paper sticker in place of metal shield, turns out whoever designed the phone in the first place used that metal shield as a structural element. No shield = bendy phone = Touch IC just so happen to be located at the bend and its balls pop off. You end up with

https://www.lifewire.com/iphone-touch-disease-4120914