There's a difference between 'a person' and 'every person'. A person can definitely do things better than any chat bot. But not every person can. And depending on the situation, a person who can may not be available.

Even then, there is a place where the AI beats all persons and is better in one way: speed. If the task at hand does not require a better result than what the AI outputs, then the time savings is big, because there are no situations in which any human will work faster.