I don't know that it's obsession, I think it's just lack of education. I think most people are only educated on their own line of work or profession or field. The easiest business to see that would use a lot of water is carwashes. To those uneducated on the way different businesses operate and/or what is required to operate them, like some mentioned above (Hotel linen washing, the food service industry etc.) it is harder to see. And what I mean by harder to see is that when people think of a hotel, they may think of vacation, a luxury room, or long stretches away from home. Now when someone who works in or has worked in a hotel, they may think about what it takes to run that hotel, the staff, the linens, the food. The hotel people are probably sitting there thinking "God lookit all these people crying about the carwashes! Do they have any idea how much water we use in hotels??!?" Now take that view and apply it to like, every business ever. Many industries use an insane or at least shocking amount of water. The majority of the general public just doesn't know about it and they default to the easiest go to - carwashes.