Just because there's more than one obvious problem doesn't mean that you can ignore the others.
More to the point, this isn't just about a single disease or drug, the same story applies to a lot of medication, including those that have zero lifestyle causes.
EpiPens are another example mentioned in the article. In the US if your child is born with a deadly allergy you have to carry around very expensive EpiPens that can cost hundreds of dollars due to co-pay and whatever. In Europe these will cost you directly less than $10 and even to the state will cost a lot less than it does to many US patients. One of the company's responses to hiking the price from $50 to $600 for profit reasons was to introduce a cheaper generic version, which as this article points out, is BS.