Nobody has ten years of experience with a code base "optimized for AI" to be able to state such a thing so confidently.
And nobody ever will, because in 10 years, coding AIs will not look like they do now. Right now they are just incapable of architecture, which your supposed optimal approach seems to be optimizing for, but I wouldn't care to guarantee that's the case in 10 years. If nothing else, there will certainly be other relevant changes. And you'll need experience to determine how best to use those, unless they just get so good they take care of that too.
And nobody ever will, because in 10 years, coding AIs will not look like they do now. Right now they are just incapable of architecture, which your supposed optimal approach seems to be optimizing for, but I wouldn't care to guarantee that's the case in 10 years. If nothing else, there will certainly be other relevant changes. And you'll need experience to determine how best to use those, unless they just get so good they take care of that too.