I can’t help but think that if you’re doing business in China from abroad, it’s good to know Mandarin. Seems like a weird take to claim there’s zero value in it.
It's definitely hyperbole, but the core idea that learning Chinese is rapidly becoming less useful for Westerners is fair. It'd be a fantastic idea if you live in BRICS and friends though. I expect China to essentially dominate that group for the rest of my lifetime, at the least.