Like all forms of art, sometimes something can be praised as exemplary of the genre, but it's not the right thing for a specific person at a given time. For example, I know the Godfather is supposedly an excellent movie - but instead of watching it, I'd rather watch Guardians of the Galaxy. I like the idea of masterful cinematography, brilliant writing, emotional acting, etc., but at the end of the day, most of the time I want to tap my feet to 70s pop rock hits and watch Starlord shoot alien robots.
So I sold "The Enemy Within" as one of the most highly regarded campaigns ever written with a richly detailed setting built on decades of lore; deep, interwoven plots; near infinite opportunities to roleplay and forge alliances; with one of the staples of political intrigue writing in the gaming world. I think many players want to be in a campaign like that, and many GMs want to run a game like that. But in practice, a lot of people get home from work, cook dinner, put the kids to bed, then they have enough mental bandwidth to disarm some traps, belch a profanity at an attacking kobold, and count a few gold pieces of treasure.
Many players don't want the Godfather, and I get that. I can't blame anyone for being enticed by saying "yes" to something they think they should want.