What's wrong with treating it as biology though? Even large software systems have biological aspects, their behaviour is emergent and if you want to observe how they work, a holistic approach is needed, you can't really reason about their full state...

For example, if you have a search engine or a complex game, you can't run tests like "for all inputs the results are correct", you're going to be fudging a lot, using randomness, using heuristics, and all that kinda stuff

Just like how mathematics > physics > chemistry > biology > psychology > economics/sociology (Auguste Comte's hierarchy reordered a bit for the modern day), moving up the abstraction ladder makes things more complex, less legible and less exact.