>Because the US chemical industry has been effectively unregulated for a century and can do whatever it pleases.
And yet I bet if I look there's actually a ton of regulation.
>Chemical A is found to be cancerous
Chemical A is assumed to be cancerous by the state of California, you mean?
> And yet I bet if I look there's actually a ton of regulation.
I'll bet a ton of that regulation is insufficient, and/or paid for, or even written by, the industry to make it harder for competitors or to allow them to increase their profits by cutting corners.
Regulation isn't some on/off switch that always makes things better or worse. What matters is what those regulations are and who they serve.
Are you alleging that California claims stuff to be carcinogenic without evidence?
Do you have a supposed motive?
Any evidence?
Whilst it's a bit of a meme, isn't it just true that a lot of stuff is carcinogenic.