The FDA's creation was directly triggered by multiple mass poisoning incidents in the early 1900s.In 1937 over 100 people died from diethylene glycol-contaminated medicine, leading to the 1938 Food, Drug, and Cosmetic Act that significantly expanded FDA authority.
As the adage goes, "regulations are written in blood". The problem is the blood was spent before many people can remember (or bother to remember). They just know the "limitations" imposed by those regulations and therefore want to get them removed.
If people don't think a drug manufacturer is safe they don't have to buy drugs from them.