Immersion, in pretty much any creative medium, is key. If you don't believe that Star Wars can have space battles and green milk-squirting aliens, the magic of the series will be lost on you. If a Hobbit's hairy feet seem too weird to you, the dragon-chasing antics of the book and films are likely to also be more irritating than entertaining for you.
However, because many video games run on slightly more surreal concepts, they rely on immersion far more. When you can play as a purple talking dragon or bipedal bandicoot and still feel invested and interested in the franchise, you know some developers did a damn good job.
Because games don't have to be perfect to maintain immersion, as a whole bunch of RPGs have shown us that plenty of weird alienating things can happen and you'll still love them. However, as the outcast child Fallout 67 has taught us well, there's a limit to our tolerance for shenanigans and issues in games.
When you're looking for a little old fashioned escapism, you don't want it sabotaged by the game itself, which doesn't seem like a crazy desire.