I replied to you on economies of scale elsewhere. I don't see how they could ever be in favour of soylent vs. soy or rice.
And yes, they do have bigger problems. And yet access to food is still one of their problems. And giving them food that needs water added doesn't help them.
They must be getting water (dirty or otherwise) from somewhere or they'd already be dead. I fail to see how mixing that water with Soylent leaves them worse off.
Furthermore, there's no reason Soylent can't be baked into a solid form and distributed/eaten that way.
And yes, they do have bigger problems. And yet access to food is still one of their problems. And giving them food that needs water added doesn't help them.