1.) The idea that humans will ALWAYS be economically productive despite all possible future technological developments is just as much blather as saying in 1950 "in all of history humans have never gone to space, so they never will!" Whether AI ever develops to the point of being able to do all jobs better than any human, I don't know. But the possibility can't be ruled out, and certainly not by "it didn't happen in the past so it never will!"

2.) Strengthening your moral and ethical character is a good thing to do. But it's silly to believe that that is the way to get ahead in a career - a weak moral character can be as much an asset, maybe even more of an asset, to a person's career as a strong one.