Except it is capable of meaningfully doing so, just not in 100% of every conceivable situation. And those rare flubs are the ones that get spread around and laughed at, such as this example.

There's a nice phrase I commonly use, "don't let the perfect be the enemy of the good." These AIs are good enough at this point that I find them to be very useful. Not perfect, of course, but they don't have to be as long as you're prepared for those occasions, like this one, where they give a wrong result. Like any tool you have some responsibility to know how to use it and what its capabilities are.