Yeah technically that is true but using the same logic you could say, "since no one is doing QA on swimming pool water I can fill my pool with used toilet water and not tell anyone."
That is: your pool water is statistically near-certain to have had animal (human or otherwise) excrement or heavy metals or soap/disinfectants or some other contaminant in it at some point in its existence at at least some proportion, and you're trusting your municipal water utility (or your septic field, if you live out in the boonies) to filter that out before it's delivered to be your pool/drinking water.
In this analogy, Amazon is the municipal water utility, and you live in Flint, MI.
Something from a dumpster may be perfectly clean, and a lot of people take stuff from the trash, and as long as it's not been in contact with gross stuff that's not a problem.
Nobody reuses toilet water.