Html and CSS is many ways a wonderful thing giving us access to information in such powerful ways.
But at the same they are both awful in so many ways. The fact that when I'm mostly reading 10/20 documents my browser is by far the most resource hungry application often surpassing my java powered IDE is a shame. That my gmail tab can take more memory than a standalone email client is a disappointment.
Adding to that is the fact how many hours of experiment it takes to do so many of the basic thing does raise some questions.
The point is that technology is so advanced after all. But he twitterer is conflating backend with frontend. Our robot overlords don't care a out centered divs.