If you don't agree that we should completely throw out food safety regulations, then I am not sure what possible legal basis there could be for not enforcing them against those you deem "not sketchy."
I don't think it is particularly comparable to the drug war; food safety regulations are not rooted in racism and misunderstandings, they come out of a context in the 19th century when unscrupulous corporations sold people lots of tainted food and drink that killed people, sometimes in large numbers.
Like, the analogy you're making just doesn't really work. If marijuana was legal and someone was selling it laced with fentanyl and a person overdosed and died, of course I'd support the feds cracking down on the laced-weed seller. Even if the people buying from him signed waivers stating they knew the weed was laced with fentanyl.