Yeah that's a bit aspirational to my taste. Sure a script is just a list of instructions but when you start adding complex data and network hops and async work there are definitely "non-deterministic" behaviors that will emerge. Ultimately yes everything is ones and zeroes and there is probably an explanation but it will be something stupid and contrived.

As a developer you lay out a plan for what should generally happen but there's no way you can anticipate all the micro variations that happen in production. It's like any kind of real life plan, really.