Surely the point of Dan Brown being on the list is because of its popularity, kind of a cultural zeitheist, part of the current cultural identity, rather than as a brilliant piece of literary genius. I don't think anyone would claim that! That's my take on it anyway.
In which case it's just a list of popular books (For some values of "popular") over the past few centuries, not a "you must read before you die".
And in Dan Browns case, I'd take death over another of his tomes.
That said, I guess there is a zeitgeisty thing, seeing as how the entire plot of TDVC was around for years before he packed it into an airport potboiler.