I remember that story. I’m definitely in that group although older. For reasons I don’t fully understand there is no meaningful difference for me in watching foreign media or media in my native English, and in both cases I require captions to understand dialogue. I am not hard of hearing in any way and don’t have problems in conversation, but I just can’t understand what anyone is saying on movies and TV. I rely nearly entirely on captions.
Do you have issues understanding people in noisy (a lot of background noise, not necessarily loud) environments (e.g. at private parties where there are other groups talking in the same room)? I have this issue (apparently dubbed "hearing in noise"), and it gets triggered by dialogue in TV shows as well.