Yes that part I don’t really care about, it’s pretty easy to point to misinformation on the internet. I think the part of your original comment that sticks out to everyone is your idea that generally, over hydration is more of a risk than dehydration.
As an otherwise independent third party, I'd like to gently suggest that you read the words again. Each case, either too much or too little, is given equal weight. I believe confusion may happen there because our brains fill in the blank and in reaching for that language it's typically done so to contrast the subject.
