The extremely expensive insulin that articles are talking about is usually a brand name like Humalog which is an altered form of insulin that is far more convenient to use. It is possible (but rather convoluted) to bring these eye-popping prices down to $99/month without insurance (https://www.admelog.com/savings), or $43-73/vial (https://www.goodrx.com/insulin-lispro or Walmart Novolog). Of course, this is all basically a way for pharma companies to price discriminate to extract as much $$$ from insurance.