I use subtitles! For a variety of reasons.

1) I have crappy hearing. Many explosions. Particularly if I am eating, I canโ€™t hear what the speakers are saying.

2)
I watch quite a few foreign TV shows where I donโ€™t understand the language.

3) Sometimes dialogue is just mumbled or incomprehensible.

I donโ€™t understand why this is such a big deal for some people?