I wonder why we don't have them at every level. If we make it legally mandatory to put such a filter in every house then it will often get clogged and cost mon

I wonder why we don't have them at every level. If we make it legally mandatory to put such a filter in every house then it will often get clogged and cost money and people will learn not to flush down the waste in toilet. I read somewhere that people learn best when mistakes cost them money. Imagine hotels having a massive filter then some might want to install sensors in individual drainage pipe coming from the individual units and charge their customers based on the amount of waste they flush down the toilet which ends up costing the money to hotel on subsequent cleanup.