It's harmful and dangerous with corporations with a proven history of lying and disregard for human lives and well being. Especially ones with a record of developing and optimizing addictive products.
People still smoke. any lies the tobacco companies sold to the public were either so old that few alive heard them, or believed them when they were told.
Like tobacco, cocoa is not an essential food and also has psychoactive components. Thus companies formed around industrializing the material must develop methods of persuasion and navigate oppositional socio-political pressure. Like the sibling comment's observation that "any more "ethical" tobacco company got out competed," the most successful were especially suited for adopting other food production lines both from an industrial-technical and a socio-political perspective.