because I can imagine all the fun they can have on the way down? Especially in old buildings where the drains go here, there and everywhere. If you poo in the ground floor toilet your poo is in the overcrowded drain in seconds, jostling it's way down the sewer. With a high level poo, it gets whooshed around, up and down on an exciting roller-coaster of a ride.
Thinking of the welfare of my poos isn't unreasonable is it?