I get distracted, no matter how interested I am, and the captions make sure I don't miss anything.
My ADHD will have me focusing on one thing in the background that has nothing to do with the story, like "ooohhh shiny!"
In vino, veritas π·πΈπ§
I used to think I was the only one who always turns subtitles on while watching shows or YouTube, but turns out a lot of people do it too. Actors and actresses just mumble half their lines anyway while watching.