Why would I pay someone to fix miles of hidden plumbing when I can just place a bedpan on top of the robot vacuum cleaner as he goes past who then hands it off

Why would I pay someone to fix miles of hidden plumbing when I can just place a bedpan on top of the robot vacuum cleaner as he goes past who then hands it off to the septic tank bot. If simple object from A to B manipulation is free & fast then we are going back to medieval times with robot serfs. The pipes will be a vestige remnant like landlines are.