That's fair, maybe that section could be re-worded. But it is an accurate, if incomplete problem statement. The current very naive use of the network is maximum duplication (looking at you, blastr). Reducing duplication by centralizing content is better in one dimension (resource allocation), but worse in another (redundancy). A good solution will balance those concerns.
The original motivation behind NIP 65 didn't grapple with the problem you're articulating (I brought this up in at least two TGFN podcasts last fall). But fiatjaf persuaded me that it basically doesn't matter, because the network will never be anywhere near fully distributed.