I don't read it as conflating, they just say these are all harmful, not that they are equally harmful. A hangnail is harmful and a car crash is harmful, I try to avoid both. I'm less put out by a hangnail and I go to great lengths to avoid a car crash.
Any list like this should be read as: "you are causing harm somewhere between a paper cut and a gunshot wound, you may not realize it. Be advised you might be causing that harm, in case knowing that would cause you to take a different course of action"
Any list like this should be read as: "you are causing harm somewhere between a paper cut and a gunshot wound, you may not realize it. Be advised you might be causing that harm, in case knowing that would cause you to take a different course of action"