Yes, I have considered the disposal costs of wastewater! Yes, I still think importing hundreds of stainless steel widgets from China and then having a plumber spend who knows how many hours installing them is almost certainly a net negative. If you piss away precious resources doing that then shame on you.
I used to live in a place where water was infinite. Fast forward 20 years, now it's not anymore, the fish bearing watersheds ultimately bear the price, but everyone is still unmetered and there isn't low flow anything. If you piss away precious resources for no good reason and claim it's not wasteful, shame on you.