The arguments I hear most around this kind of stuff is something along the lines of, "the innovators have a right to charge however much the market will bear" and, "if we take away the incentive to innovate, these drugs will not exist."
My thoughts against these lines is that patents cause monopolies, so they are not "free markets," and there would still be an incentive to innovate because of things like the first-mover advantage, and that reducing costs is also a form of innovation.
My thoughts against "punishment" arguments, are that punishment just for punishment's sake is cruel, useless, and often counter-productive. I don't think people have as much agency as we'd like to think. In the case of type-2 diabetes, insulin is part of the rehabilitation.
I think that article is inaccurate. I've always seen communism described as a state-less society.