in theory, you have a point.
but in practice is where u r wrong
yes, the dollar bill per se is just a piece of paper, but the value behind it is what sets its price. claiming a piece of poop has value is the hard part because A.) everyone can poop and create new poop at home. B.) who the fuck are you so that your poop have any value? unless you are a mega celebrity, or a simp magnet like belle delphine you wont be able to place any value on ur poop; whereas the federal reserve can and has a solid establishment behind them to dictate the value of the dollar… not to say that just because it's "legit money" it is valuable. just look at venezuela, zimbabwe, and as of late Argentina.. the inflation has fucked their cash harder than daddy howard