Insulin is made the exact same way (essentially) as it was when it was first developed for public use. There's no 7 year protection.
Current prices for insulin are based on profit shares, not production costs or any government protections of patents.
But you were talking about the drug industry being a result of capitalism it is not just based on that one fact there is more to it
But in general you cannot make the claim drug industry is the result of capitalism there are many laws to protect drug companies I don't even know half of them but that was just one