For example, a machine can be made to sing better than a human from a purely technical perspective. But once you know that the person singing is a human being with a history of happiness and pain, ups and downs, you can connect on a deeper level. The song gets meaning.
Or a soul.
I mean, would you want a machine or a human singing on your wedding?
When it really matters we will always pick the human.
Now, what is a more likely development is an _augmented_ human, improved by machines. The wedding singer will use autotune (or at least a mic). And that's fine, I guess, it's still a job.