Not particularly - resource bases being what they are, big ships would be built anywhere there's a large population base of TL9+.
Yes, really. Building few big ships instead of many small ships will help no matter what. It's not enough on it's own, but then, I mentionmed the other measure that was needed (keeping the high-population worlds at a distance). Oh, I did forget mentioning increasing the number of places that would need to be patrolled.
The way to mandate a small ship universe is to change 3 core assumptions:
1. ratio of per-capita domestic product to ship costs
2. ratio of drop-off of demand for time in transit of orders
3. ratio of drive-essential component materials to population bases.
That would result in a Few Ship Universe and would presumably increase the rarity and value of the PCs' ship, which is already troublingly high.
Hans