I think you missing my point. My point is not that IPv6 cannot be secured, it is that the author's take is controversial because people are skeptical about whether networks ARE being secured when NAT is not present. This skepticism is backed up by the research paper that I quoted and real world experience. IPv6 is deployed in many places incorrectly and without the good defaults. IPv4 NAPT in residential networks acts as a last line of defense because most users have been incapable of turning it off.

I suppose I will distill my thought into the assertion that the author should have prefixed his title with "In capable hands,"...