If that article (which I won't read purely based on it's title) is written for roadies, then it is moot to our discussion here. Traction, high frequency bump absorption, suspension, rotating wheel weight savings (the bigger the tire, the more the savings; my fat bike when I went tubeless lost 5 lbs of rotating weight!) and ultimate pressure control are all benefits. If these rims were capable for running tubeless I would have done it. They were wide, cheap, and disc ready, that's why I bought them.
I have a tubeless set up on my gravel / road bike. I really like the ride they produce on pavement as well as trail. Are they faster than tubed tires? I don't care. I'm not fast, so my bike doesn't have to be.