For instance some of the most interesting part of the game is simply the protagonist having a chat with various characters of the crew. The crew members will then talk about their life, their perspective about the world and their opinions about events that has unfolded, their opinions about the planets they just visit, their opinions on other characters etc. While this occurs in movies, the dynamic nature of film where the story must progress means that you can't spend exorbitant amount of time having two people chatting that doesn't directly advance the plot and dramatic arc of the movie.
With video games you can tell a tight story. A player could just follow the main plot and skip anything extraneous it would function like a movie. However on top of that you can have downtime in between the plot crucial elements for simple character building event. For example if a ship flys from one planet to another. In a movie that would be a transition shot where the movie would skip from one planet to another.In a game it means time for you to talk and get to know various characters. This is because in video game the player can control the pacing of the narrative. You can spend a lot of time simply reading up on lore (that develops the environment and history) and talking to characters that flesh out characters of the story. The luxury of pausing the narrative is a positive thing in my opinion.
Yes in film you do get to know the characters if they are directly relevant to the dramatic arc of the narrative. However sometimes getting to know the characters is interesting in of itself beyond it's ability to affect the storyline and those elements would be cut out if it was turn nto a movie
If kotor was turned into a movie. I would love to watch it but there would be part of me that would say a lot would be loss by the transition.
My view is that characters is the basis of suspension of disbelief of fictional storytelling. characters that feel like living and breathing people creates an illusion of reality as otherwise what happens on screen are just simply pixel on the screen, text on a book, frame on a film etc. no one cares about a fictional world blowing up as that world doesn't exist but people care about a fictional character dying because that fictional character that is well written creates an illusion that they do actually exist. the ability to pause the narrative for simple character building is one of the biggest advantages of storytelling as it really maximises the suspension of disbelief of the narrative as you really get to know the people of the story even more than other mediums.