Now with this I disagree. Published adventures (we call them "canned modules") can and do work very well in a randomness-heavy game*. Most of the adventures I run are canned, either written by someone else or by me. It's very rare if ever that I run a whole adventure off the cuff, though almost all none of the between-adventures stuff, travel encounters, etc. is preplanned.The people here that I see referring to story that way are almost always trying to run their table through one published adventure or another. Published adventures are their own error state, IMO.
Where randomness causes headaches is if one is trying to run a hard AP as the campaign, or keep things on a tight course.
* - either that, or I've been mighty lucky all these 38 years.