Why do we buy so much water?

So many of our household products have tons of water in them. Liquid dishwasher detergent, liquid laundry detergent, cleaning supplies -- all these things could be hydrated by the user at their home. So why are they so ubiquitous? Why have I never seen anyone my age use powdered laundry detergent? We know that water is already being added to wash our clothes, right??

The amount that we're paying for manufacturers to just ship around water has to be enormous.