Mmmm... well. I'm 44. Sometimes I find D&D (and the whole fantasy thing) silly. I definitely approve if somebody starts an editorial line with high profile stories and plot aimed to people without adolescence issues to cope with
let me say aimed at people accostumed to read high brow literature. My wet dream is WOTC hiring hi level writers and creatives to design out of the standard adventures in a product line called "D&D Experiments".
I've thought about that. I would wait about 10 years for the younger generation of writers reared on it to make its way through the pipeline, so to speak--Lev Grossman did a fairly highbrow trilogy that deals with the effects of the game within a modern-fantasy world--the wizards have played D&D and researched spells that copy Magic Missile and Fireball, among others. Being a DM involves storytelling for an audience, so it's not crazy there would be overlap with writers.
Personally I don't think 'highbrow fiction', with its focus on interiority, would work well as a D&D module--the guy's reflecting on his middle-aged angst, roll Wisdom save to see if he buys a new car/ breaks up with his wife? (Change gender/etc. of protagonists to your taste.) There are indie games that do these kind of personal conflicts, of course, but they don't sell all that well.