“The logistics of collecting human waste would not be efficient at all...”
Except where we are already collecting it. Which is in the big cities with centralized sewage systems. That cost is already paid, and the infrastructure must be maintained regardless of what they do with the waste. So in that case, it might be feasible.
Thank you, Captain Obvious, but that isn't what the article is advocating:
"Let’s say I wanted to give my urine to a farmer. How would I go about that? If you live in Vermont, you can donate it by the jug. The foundation supplies free funnels and has a collection depot in Brattleboro. It can be “a little sloshy” at first, peecycler Kate Lucy told the New York Times, but you get used to it."