Obviously the title was a little ridiculous, but I up-voted it, because it's a novel idea. If you're planning to have almost all of your static assets hosted from the CDN (which is pretty reasonable for almost everyone) then why bother with a super high-throughput low-latency web server if the only purpose is to occasionally refill the CDN? If you end up thrashing the CDN and constantly going back to refill it, you're going to have bigger problems.
From what I can tell, the rest of your comment is just super aggressive and doesn't really go anywhere. I will tell you that I have extensive experience with every piece you've mentioned here, and none of that really has any effect on the author's thesis (again, no need to optimize serving static content from your host if a CDN is going to do the legwork).
In general though, when someone works at Mozilla, I tend to give them the benefit of the doubt regarding their knowledge of elementary computing principles.