That's like saying you don't understand how anyone expected to make a career in metal work? Surely we would find something better than metal within a couple of hundred years right there's no way that industry is still exists in a thousand years.

The pace at which tech has been advancing and its role changing in our lifetimes is way faster than you could just make a cozy career out of.

Useful development, or just development for the sake of development so the shareholders are happy? Useful being defined as a product that people would still be happy to use in decade from now.