Agreed though the article has this disclaimer:

Before we dive into the code, I think it’s worth pointing out that the goal is largely to be immersive and expose some lore. I think this design and effect fit because of the theme and because it’s not for critical content. My point is that it’s just an aesthetic component for a game that makes this acceptable — I don’t think this is necessarily a good user experience for your every day website where there are stakes.