They don't automatically get a pass. They get peer reviewed.

It's also not one study. They've done multiple over the years, with hundreds of participants. They've done studies where they include people with known environmental exposure, and they still find that exposure to talcum powder counts as part of cumulative exposure.

Is it possible they're just flagrantly lying about their research results? Of course. Tell good enough lies and it becomes up to reproduction studies to find contradicting results. But there's as much money, if not more, to be found in finding those contradicting results, and yet...