"Please don't post shallow dismissals, especially of other people's work. A good critical comment teaches us something."

https://news.ycombinator.com/newsguidelines.html

It's a pity that you didn't make your point more thoughtfully because it's one of the few comments in the thread so far that has anything to do with the actual paper, and even got a response from one of the authors. That's good! Unfortunately, badness destroys goodness at a higher rate than goodness adds it...at least in this genre.