It most definitely is. However, it's also the only thing about its history that Korea exports to the western world and unless you really care about the area, it's not like any random person asked on the street could tell.
Joseon didn't focus on inventions. Joseon dynasty had a single king who actually liked science. Reducing all of Joseon to this one individual is kind of like reducing all of Rome to good ol' Nero, as interesting as that may sound.
Joseon navy was garbage (talking on Asian terms), it won a war against Japan because the Japanese navy at the time was even more garbage. Navy was not a strong point of this part of the world very much until Japanese kicked Royal Navy's ass (and the ensuing naval war with the Allies where the connection between Japan and seamanship in games most likely originates from).
And Seowon, as Guandao already noted, were not scientific institutions, but confucian ones. Though I already talked about that one before on here.
All in all, I agree with Zaarin that Aesthete (with maybe a secondary scientific focus) would fit the Joseon Dynasty much, much better as they did have an actual reputation for exporting high class confucian culture (go figure), unique porcelain and such. After the Japanese retreated, they brought valuable Koreans with them. They did not take "scientists", they did not take seamen, they took artisans who served to establish a distinct Edo period type of roof tiles, they established the very first domestic Japanese porcelain workshop and things like that. They also brought home a book about gunpowder weaponry (Shenqipu)... which was issued by the Ming to the Joseon troops as they were deemed inexperienced with these weapons compared to their Chinese allies and Japanese adversaries.
So yeah. I won't complain because it's an established Civ tradition (and likely game balance played a role since Japan already took the aesthete focus) and having Joseon, even if mostly misrepresented, is still better than not having any Koreans at all. But there is big room for improvements. At least we might get very nice look into the armor and equipment of the late-Ming? Joseon era with their generic units.
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