If you don't have laws, or don't enforce them, people will do whatever they want.

I can remember when this simple point was obvious to almost everyone.

yep one of the first rules of any market should be

you sell a product -> you are responsible about the product

with a ".. -> you must be honest about the product (/what the products does, provides, etc.)"

to see how absurdly not followed this common sense(^1) is in the us look at supplements

1. provider are not hold responsible, non small parts of sold supplements are harmful in one way or another. Even cases like supplements advertised for pregnant woman with highly dangerous components for pregnant woman existed, no major change followed.

2. high amounts (AFIK 80% or so) of supplements sold in the US are severely dishonest and don't quite contain what is advertised. And this isn't just about it technically containing the supplements, but in a form the body can't absurd. But it goes so bad that "it's just sugar pills" is more on the harmless side... (and even that is dangerous given that many people take supplements for fixing health issues caused by to little of what the supplement).

not only has the US not fixed it when it started going out of hand, they went explicitly out of their way to not fix it.

(^1): (Common sense for anyone looking a bit into market dynamics/consumer protection etc.)