It gives evolutionary biologists great status if they champion competition and the economists have to consult them. The economists have to consult the evolutionary biologists, because they are the ones who invented the idea of competition. It comes from the field of evolution.
If we ask for more and more material for the construction, i. e. more and more choice, we're likely to end up with a lot of combinations that don't do much for us or are far more complex than they need to be.