Author asks: "I would start by measuring the magnitude of mass shootings as a problem. How does it compare to other issues such as preventable diseases, regular crime, terrorism?" But is that the best comparison? What about comparing it to frequency and impact in other countries? When we want to evaluate the effectiveness of a treatment, we don't measure efficacy against the treatment to a completely different diseas…
No, he is not. He is saying, anything that is statistically small, and the elimination thereof would substantially restrain the rights and freedom of others, should be questioned.
No matter how you are going to argue, there is at least "some" purpose for guns - for self protection, etc. If the discussion were really about saving lifes, it makes no sense why not putting a ban on smoking, something that clearly has no purpose at all.