And yet apparently Apple covered liquid damage with the fist generation of Apple Watch.So, basically same whine as the 100 people before hummm.
The first Apple watch was not even rated to go under the shower (or waranteed) yet, many people used it 18 months even swimming.
Water damage is not the same as other types of damage, you have very little way of knowing how it occurred.
That's why they can't cover it; doesn't mean it suddenly is likely it would fail from it. Apple tends to overengineer these kinds of things (though its harder to do so with the phone than the watch).