The amounts you quoted are fine.the rest...
most people in the western world are overweight. Most, as in over fifty percent.
Most people aren't capable of distinguishing between thirst and hunger and eat when they're thirsty (you seem good with links so please look it up yourself)
And this is part of the reason they overeat. Too much salt in diet,
More thirst that gets mistaken for hunger and overeating.that's the mechanism.
The other big reason is overeating carbs which has been unnatural for the past idk two hundred thousand years. It's just agricultural marketing with nothing scientific/medical behind it.
Anyway.
You're either over hydrated or overweight.
I'm pretty sure there isn't a single person in the entire world who is both.
Sure, fat people have fluid retention...because of dehydration.
A properly hydrated body retains zero fluids. You excrete exactly as much as you drink every day.
I know because I've had periods where I made sure I drink enough (for me it involves math and a pen and paper and post it notes none of which is paranoid for me. But like you said, I'm a special case.
During that time I drank 1.5 gallons every day. At 120 lbs I might add.
I never felt better in my life.
I was never tired and I had so much every to do everything and I was so active
And generally just felt great.
If that's over hydration I think everyone should be over hydrated.
By the way,I drank pure water and not sodas.there's a HUGE difference.
I wish I could be bothered with keeping up vote much I drink every day now.
It's just so hard. So I'm often tired and dehydrated and it sux.