Imaginos1892 wrote:Most systems don't have shipyards. They're a gigantic chunk of capital, with huge operating expenses. Without a shipyard, each ship is also a huge capital expense, and an ongoing expense as you have to pay somebody else for maintenance. So a lot of systems don't own a lot of ships either. They buy a few LACs for defense and rely on somebody else, like the Manticoran cargo companies, to carry their trade.
If they're part of the Solarian League, they just leave system defense to the ISLN and might not own anything except a few in-system shuttles.
I'd guess that less than half of all star systems own even one hyper-capable starship.
Which isn't to say that they aren't (at least occasionally) visited by other people's merchant ships.
Most countries on Earth, even ones with coastlines, don't have a real "blue water" navy. They've mostly got gunboats or other short ranged coastal defense craft. And most don't build or own merchant ships. It's enough that they can attract trade carried on other people's hulls. They don't want to, or can't afford the massive capital investments to build/buy, maintain, and operate freighters of their own (much less blue ocean warships). And of those that do own and operate freighters they're often foreign built - because South Korea (for example) does enough freighter construction that they've got significant efficiencies of scale and can sell you a ship for significantly less than it'd cost you to build it (even if you already had the shipyard)
Even fairly large and prosperous countries like Australia struggle to keep a naval shipbuilding / ship refit industry afloat - they just don't have the critical mass of work to keep the yards employed and the skills sharp.