It’s actually funny seeing how frustrated with subtitles my American girlfriend gets when we watch anything foreign. “You mean this basic skill every 7 year old has is hard for you, an educated super smart 30 year old? Bwahahaha”
I still prefer watching everything with subtitles. Actors mumble a lot.
With subtitles my eyes are drawn more often to a part of the screen where nothing visual is happening. They aren't glued there, but it does create some bias. I have occasionally rewatched a scene without subtitles and noticed a lot of subtlety in the performance I had missed the first time though.
That said, a bad dub is at least as distracting. Probably much more so, if anything. I would rather watch a bad sub than a bad dub, though I have occasionally enjoyed dubbed things as well. I don't think it's an all or nothing thing, but "never watch dubs" is the hard line heuristic that makes sense to me if you're gonna go that way.
Crucially, outside of preference, subtitles are occasionally necessary for translating text on the screen (e.g. on building signs, newspaper front pages, posters, chalkboard writing), as information is conveyed solely through writing without spoken dialogue.
For example, consider the chalkboard scene in "Komi san can't communicate": https://www.youtube.com/watch?v=JoH8I-NC5tM . It's key to the story that a character has trouble communicating verbally, so subtitles are essential to understand the written communication on the chalkboard. (You can then compare to a more extensively subtitled version that translates all the text on the board; good subtitles make a difference to storytelling: https://old.reddit.com/r/anime/comments/qdjgba/the_blackboar...).
Yep I have no problems hearing but newer movies and shows have uneven mixing where it can get really hard to hear over the background noise and subtitles come in clutch constantly for that
I don't like dubbing because it's generally much lower quality than the original performance, but I get why people who don't have a problem reading could prefer it.
French have great dubs and most of the movie released are watched dubbed.