Unpopular Opinion: Dungeon design has been bad for a long time

[Shurrikhan]

MMO game philosophy for the last 15 years maintains that leveling content is a sort of long 'tutorial'.

1. Dungeons include, but are not limited to, leveling content. What of level-cap dungeons?
2. Tutorials tend to add elements of difficulty cumulatively with the intent of expanding practical knowledge and means of engagement. Dungeons do not have cumulative difficulty, but instead regress and leap arbitrarily, with no provable accordant learning purpose over their course, only via select dungeons.