alt Hacker NewsIt's already like that, for a long time. Humans are quite capable of creating complex systems that become unwieldy the bigger they get. No one person can understand all of it. I will offer the AT&T billing system as an example that I'm all too familiar with as a customer, due to the pain it causes me. So many ridiculous problems with that system, it's been around a long time, and it is just so screwball.
Biological systems are vastly more complex, and less brittle, in the sense that killing a single cell doesn't cause system failure like for example removing an object file from a program often would. Just look at the complexity of a single sell, and try to imagine what an analog of similar complexity would be in software.