Earlier quoted context omitted.
> It is surprisingly hard to extract monetary value from an intrinsically valuable solution. This is like saying that our entire economic system is backward ...
I have no idea what gp means by this. It can be surprisingly hard, but it's not always. Go buy a cooler of water bottles and sell them for 50c in the summer on the side of the street
Even your "sell water on a hot day" idea probably won't sell a lot if you set up shop right next to an enormous promo stand from a global bottled water company that gives away bottled water for free. (And due to the magic of the internet, every spot you pick is right next to a global competitor with deep pockets)