Or would that be too confusing and scary for Apple customers?
Apple is not a victim here.
Acting this way was a choice, which may have been fine with had Apple not denied the issue and allowed replacing bad batteries under warranty.
There's only so much you can do to make lithium batteries last forever. These days the phone tries to figure out when you need it charged by in the morning so it's not sitting on the charger at 100% for eight hours overnight, and this is supposed to help.
It's true that battery degradation can't be avoided eventually; but there's a reason why these complaints are rarer on high-end Androids (Also low-end, but it's likely users have appropriately lower expectations for these).
The change would have been to simply advertise the service life was shorter than it actually was, to account for various worse batteries, but the long tail of worse off batteries would have still been there regardless.