This is exactly right. Architecture -- in fact, using any kind of abstractions at all -- is basically a crutch that humans use to make ourselves more effective in implementing and evolving code over time, usually by either compressing the problem domain so that we can pack more of it into our limited brains, or making our own mistakes visible early. It's extremely valuable for humans who need to work on complex systems -- but it might simply be unnecessary overhead for entities with significantly more working memory, just as humans won't plan out a class hierarchy for a 5-line script, much less write a PRD.