Jumping in here with relevant experience - because you're absolutely right.

In 8th grade (~16 years ago) my substitute biology teacher organised a "Water drinking competition" poised to elevate our understanding of stomach capacity, etc.

Two of us went to hospital, and ~5 (including myself) had to take multiple days off of school and recover.

It's very dangerous. He lost his job.

It’s actually dependent on your individual biology and the environment that you are in.

You need more hydration in hot climates than in cold damp ones. Also your activity influences how much hydration you need.

Ps I don’t think the article is about how much water you drink. (Edited to make the last sentence clearer)

Only if it gets ridiculous. Like after a marathon drinking a gallon on the spot (and dying from it).

Drink 2-4lt a day and you'll be fine.