I beg to differ esp. with desalination, polls showed people would refuse to allow that water into a public water system.
If by referring to recycled water carried in purple piping you mean people aren’t allowed to drink it because it was not processed for drinking then you are correct.
I have no clue as to what point you are trying to make. Desalinated water is used as a potable water source and it is allowed in public water systems all over the world. As I wrote before, reclaimed water is not allowed in the potable water system.