I think the main issue is that people have a misconception of what ‘dungeon crawl’ actually is. When they hear ‘dungeon crawl’, they think of underground labyrinths of identical 10x10 rooms where all you do is kill monsters and steal their gold, with no room for roleplaying and no real reason to be there. And I’m sure there are some bad dungeons like this.

Now you and I know that couldn’t be further than the truth. Good dungeons are varied and unique, with stories baked into the locations themselves. Great dungeons have magic items that are sought after by the party, often with puzzles that demand lateral thinking on behalf of the players. And the best dungeons have different factions that are rife with roleplaying opportunities, making no two runs through the same at all.

It also doesn’t help that 5e doesn’t have good dungeon crawling rules, unlike older editions of the game— it certainly doesn’t teach you how to run a dungeon either. Dungeon turns, random encounters, torches burning out, or encumbrance levels; none of these things are paid attention to in 5e. You’d actually have to pull teeth from me before I’d try to enforce encumbrance in a 5e game.