This actually isn't true; you can invent organizations of the imagination and mirror those. This "imagination driven programming" is actually quite dangerous and tends to devolve into state secrets and so on since you are solving the problems created by people who "don't exist" but may in fact have lives that are SURPRISINGLY SIMILAR to the lives of people who are doing jobs that are better kept secret.

So you can get around the law...but only by risking the integration of something that should be kept secret into the organizational structure...which makes its way into your system. Most people aren't willing to cross that threshold.

So Conway's law is true for most people, just not all.

If you want to think about it from the adversarial point of view, you can say that all programs are designed to transform or destroy organizations; programs mirror organizational structures because people want to determine the "resonant frequency" of an organization and understand its "social vulnerabilities" in much the same way a physical structure has structural vulnerabilities.