And not one of the games you listed could be made as an MMO.
You are correct, they tried adding this single Jedi class into a game filled with non-force users. The idea is to have a game based around and focused on force users. Jedi Sentinels, Guardians, Consulars, Weapon Masters, Watchmen, Masters; Sith Sentinels, Guardians, Consulars, Marauders, Assassins, Lords... Jedi civil war, Jedi vs Sith, hell, you can even throw the Mandalorians in there. This is where the Star Wars MMO money is. 10 million people don't play WoW to play a castle guard, or a foot soldier. People don't want to play grunts. These KotOR classes fit very neatly into the fantasy archetypes that almost all of the MMOs use.