"Let the customer verify if the flour has asbestos in it, and decide if they trust it."

"Let the customer verify if the car airbags were installed properly, and decide if they trust it.

"Let the customer verify if the plant that produced the plastic in their grocery bags is dumping its waste products in the water nearby, and decide if they trust it."

No.

We have governments and regulations for a reason. It is utterly unreasonable to expect customers to verify everything themselves. We need clear, firm labeling laws for all kinds of products. There's no reason this should be different.