Because they insist on mixing the audio in a shitty way so unless you want to fiddle with the audio-level every 5 seconds or have your eardrums shattered by action/suspense-scenes, you can't hear dialogue and need subs to understand what the fuck is going on...

Edit: and before people start saying "5.1 in stereo is the cause!1!!1!1", no forcing stereo does absolutely nothing to alleviate this.

I for one love having to turn it right up to hear the actors mumble important plot points at eachother right before gunshots or jarring violin stingers damage my speakers/ear drums/wake my kids up.

Dunno why you're pussying around with subtitles lol.

Also a lot of people forget that English is the international language, and most of the non-native speaker can't really hear the pronunciation correctly. Well, i don't at least.

reminds me of this:

I'm hard of hearing and Hollywood insists on making dialogue bearly audible, so I need to use subtitles to understand wtf the character just mumbled.

Also, she doesn't suck at eating popcorn, that's the suprise popcorn you find after you've demolished the rest of the popcorn.

As a millennial that had Gen X and boomer relatives... So do they, especially as they got older.