Back in the dark ages of the 20th century it was much the same. Yet we quickly crawled out of the dungeon anyway.The DMG's rules, advice, and tables leaned heavily of straight dungeon crawls and the majority of the starting adventures and character options were traditional.
I don't think there is a shortage of new players converting to old school style games.
I don't see the DMG particularly pushing dungeons. While it's been a while I don't remember LMoP being particularly dungeon oriented. There were places you were in town, spots that were more location based. I guess you could call something with a dozen rooms a dungeon crawl because it's set in ruins or a cave system but I wouldn't.
There's enough of a player base that we can have a variety of modules and I don't see an issue with that. It's not like any grouping of individuals, especially by age, is ever going to be monolithic.
I think it would be a mistake to make modules that were old school like some of the OSR folks were pushing in another thread. Fortunately they aren't doing that.