If you've studied artificial life and see societies as mechanisms for executing the genetic algorithm, you see the faults with the growth ideology you've criticized. It's a plateau-making machine: it will tend to reward what's working right now, and starve out the genetic pool of anything else, leaving the resultant society unable to adapt.
Computers acting like people and people acting like machines is a bad trade-off. It's not at all focussing on the strengths of each. There's a reason societies (such as big cities) that seemingly focus over-much on caring for useless and suboptimal people (compared to the darwinism of the wild frontier), end up burgeoning and becoming hotbeds of accomplishment. If you treat people not as machines, but as the genes of the genetic algorithm, it suddenly makes a lot more sense to be humanist: you'll get unexpected wins out of unexpected traits being cultivated until they can be useful in their own right.