He's stating a fact that you don't dispute. You follow up with hyperbolic language; "eating rotten food" (as if anyone would purchase their goods from purveyors known to disregard food safety).
In a market that has been designed to let people take part in voluntary transactions, we also design methods for making sure that the counterpart takes responsibility, and delivers the agreed amount quality of product.
If you purchase a car that won't turn on, you're in your good right to make a claim against the producer. Same for all the other things you mention. And people do.
You're making a point about negative externalities. Agreed that a factory shouldn't just be able to poison a river, because there's no tangible cost to piping your dirty water to one. Here it makes sense to make artificial interventions, in my opinion.
I never tried to dispute the fact, I'm disputing the idea that we should be free to opt out of benefits that have been agreed as the minimum requirements to do business in a society. I would actually go further and argue that allowing that freedom would lead to everyone being worse off. Having minimum standards in a society gives a solid foundation on which to build, can't think of any society that doesn't have them.
A way more interesting conversation would be where to regulate, how much, for how long, what impacts would it have in innovation, etc not that I want to be free to get sold broken goods.
> as if anyone would purchase their goods from purveyors known to disregard food safety
How would you know they disregard food safety if there's no regulation on what food safety means?