What’s the evidence that the data going in is garbage? We already ascertained most of it is GRADE quality moderate.
If the conclusion that comes out of the other end of the pipeline is that we should avoid eating the things we’ve eaten for millions of years, it’s fair to say what went in might have been based on false premises.
Heck, water treatment plants are novel compared to the pathogen-laced water we’ve been ancestrally consuming, but I doubt you eschew tap water for puddle water.