I think that ego/status is a big part of it. And the loss aversion bias. Our thought process is "This thing is going to be able to do software as well as a human, therefor it is going to take my job." When a more optimistic and probably more realistic take is "This thing is going to do the boring parts of software, so I can spend my time building out the more interesting, big-picture parts of code. I'm going to be so much more productive." But the fear of loss is so much more distracting than the potential gain. ... And what is it that we fear losing? Status! Software development is in high demand, it's a sought after role, we feel "special".