How is that analogy wrong? Both in terms of the technical implementation and the subjective user experience, you're making separate requests for a document each

How is that analogy wrong? Both in terms of the technical implementation and the subjective user experience, you're making separate requests for a document each time. Analogies are always going to be imperfect, but I can't see the argument that the "separate request" analogy is any worse than yours, let alone "wrong".