Nemesis Destiny
Adventurer
The biggest issue for me that the author of that blog missed, is that I (and I assume others) write my own adventures because cookie-cutter modules (yes - even the "good" ones) aren't set in my campaign world. Sure, I can (and have) dropped modules in, but it takes a lot of re-writing to disguise that fact, to the point where most of the time it's less work to just write from scratch. And if you don't take the effort to do so, it feels very "drop in."(Oh, and see also Adventure is Key.)
The reverse is also true. I'm currently struggling with re-writing one of my own modules to be generic enough for a submission to Dungeon. It's hard. My stuff is all peppered with references to my campaign world, story arc(s), and even the specific character(s) involved.
That said, Paizo does do decent adventures. It's their biggest selling point for PF. The rub is that WotC can do decent adventures as well (and they have); they are every bit as capable of producing excellent modules as Paizo, they just, for whatever reason, choose not to. It's baffling.