Eh well
Yes it is of my buisness.
Greatly actually.
Not wanting to sound rude, but by most measures of statistics, I have about 30 years more left on this planet than you.
And if you use twice as much water for the same laundry with (probably) worse results, more chemicals and more energy as well and thus leave me without the possibility to - lets just say - take a bath once in a while when I'm 70....
Well, yes, I will tell you what you can use.
And drinkable water is verry much not an infinite, limitless renewable resource.
You know, droughts, melting ice, shrinking rivers.
Such.
Desalination uses obscene amounts of energy.
Water treatment to a lesser extend.
Still, significant.
I mean, it has been said often, but not saying it would just be wrong...