It appears you're the only rational person left in this place.
I deal with IP ratings every single day when ordering equipment for assembly lines, robots, etc. that I design. IP67 IN NO WAY, SHAPE, OR FORM MEANS WATER PROOF. Neither does IP68. IP69 is required for anything that's going to be hosed off, steam cleaned, or deal with repeated submersion. Even at that point, IP69 does not mean you'd be covered under warranty if you took it swimming. It means it passed the required tests in a controlled lab setting to receive that rating. Plenty of IP69 rated equipment still gets labeled water resistant.
It's entirely up to the manufacturer to decide if they want to call something water proof, and warranty it. Apple never called the phone water proof. For reasons I'll never understand, feel free to shower with your phone, just know that you're taking a risk with no liability on Apple's part.
The issue is apple has several commercials advertising using the phone in the rain/water. That is really poor on their part. They should not encourage people to use it under those conditions and then not honor a claim.