I understand pure H2O by itself wouldn't save you if you were dehydrated, but why is it actually harmful to drink?
Pure or demineralized water sucks electrolytes out of one's body into the gut lumen and dissolves teeth. Absolutely pure water is a powerful solvent.
https://tinyurl.com/y6d8hx6m
Just another reason why honey is a miracle food when consumed in a balanced way.