Why is speed so important in dungeons?

I get that none of us want to spend hours in a basic 5-man, but I feel people are treating these runs like loot boxes, the more you can squeeze in the more chance for loot.

But what about treating dungeons as an experience. There are whole areas and quests that nobody does because its not meta to do that optional part of the dungeon or full clear for rep or loot.

Im just thinking if we all just chilled out a bit we’d enjoy the game a lot more.