Lineage was a thing way before Souls came to scene. And Sword and Fairy 1 is 1995 game.
Eh, I get what you're trying to say, that Korea and China deserve way more recognition for having an active game production market well before Westerners took notice.
That said, I don't think you're going to prove your point with these kinds of examples. Lineage was an MMO iso turn-based game with totally different play, I'm not sure what can be proven of it to have had an influence in Souls design. (Or are you talking about Lineage II? Either way, Souls was always considered kind of a reinterpretation of old King's Field concepts... though I'm assuming Lineage had something like the leave-behind mechanics or something like that?) And S&F as a franchise goes back, but it unquestionably cribbed JRPG concepts at every iteration of the series.
Korea is a different story from China, its heritage is easily traceable in the global gaming market for a long time and developers like Blueside even rose up for a short while to be marketable players in the console wars back when that mattered.
Chinese developers rarely had a presence outside of China until suddenly the scene burst out, but sure, they were there too.
This stuff is popular, common and existed for decades in Asia. 99% of westerners are illiterate about this stuff and getting exposed to it start to sprout some wild bullshit "opinions"
Ultimately, you're right, it's not fair to shit on games from Korea (or China) solely based on where the game developers are from.
However, with the way money moves through these big corporations to find and fund talent in game production, and how popular engines have commodified certain types of design practices, the end results push towards a flattened common level. (This is true in many other game markets too, but this is one we're talking about now.)
So you often get responses to videos going "Meh, this looks like every other Chinese UE knockoff game trailer I've seen this year!," and then somebody else goes, "Dude, this one's Korean", and the other guy squints and eventually comes back with, "Yeah, but still..."