Yes, but if you provide one, you're liable to fulfill it. (then you get into all of the lovely T's & C's which all of us so blithely click on every time there's an update)I would like to direct everyone to this page
https://www.consumer.ftc.gov/articles/0252-warranties
Warranties are not required by law. Straight from the Federal Trade Commission.
Argh! There's that "proof" word again (@Black Magic ). Isn't. Not remotely. Will not be in our lifetimes.
Apologies @ApfelKuchen I missed your post. A couple things you stated I disagree with:
" If the phone is operational, then they could get a hardware diagnostic that reports the state of liquid contact indicators, barometers, etc., but it still doesn't tell them how/why the liquids got there, and "how/why" is the bone of contention."
Actually how/why doesn't matter in the least if Apple has indicators that the depth was exceeded. Regardless of how or why the water got in there, if it's deeper than 1m of water, you're in violation of the warranted limit.
and
"The knowledge that the phone is water-resistant will not change their behavior."
So, you've turned a blind eye on all the gleeful idiots on here that have been showering and swimming with their AW1's over the last year and a half?
Agree with everything else you posted. Apple will most assuredly be scrutinizing every water damaged phone that they get back to make the resistance better for future iterations.