I was excited to see such a fresh UI from the UNESCO site when the page first loaded, then as I started reading I realized the right half of every sentence is cut off in Safari on iPhone 6/7/8.
In all seriousness, data visualization requires all the space it can get. I agree the graphics are not that fancy, but displaying them on mobile would be rather uninteresting as everything would be tiny.
Usability. They tried to do all sorts of fancy charts when a simple one could have sufficed. I’d bet HN has more mobile viewers and desktop.
So in this case all that expensive money spent making that page isn’t really worth it since a large part of internet wouldn’t even be able to properly read it.
Worse is they half arsed responsiveness. Could have left safari to browse the page like a normal desktop page but their width metadata gives a very poor experience.