Regardless of how a single person wants to experience the game, it's still rude to expect people to wait up on you. Not everyone has the luxury of waiting around for people, I've been in parties with plenty of people who mention they do their daily before going to work or school or what have you, and thus want to get it done fast. And this is fine. You just need to expect speedruns now. It's very easy to either use party finder to find people who want to experience the story within the dungeon, or to just state to a DR/DF party that it's your first time and you want to watch the cutscenes, and see if they'll let you or not.

Expecting a group of strangers to wait up on you if you don't say anything about it is extremely rude, as they literally have no obligation to. At the very least, letting people know your intentions for the run helps to know if you should find a new party or will be okay with the one you're currently in. It isn't that hard.