I believe you are overestimating the percentage of the population that understand the basics of how a toilet works. Not looking down on those folks but in my ex

I believe you are overestimating the percentage of the population that understand the basics of how a toilet works. Not looking down on those folks but in my experience, there are folks that think about how things work or have some practical experience, the rest don't ever think about it and so most likely do not even understand the basics. Nothing wrong with it but its fairly apparent. Inversely, those folks that think about how things work tend to be fairly overconfident in their ability to recreate/repair/innovate. In reality there are often fine details that you miss.