It was a generality. Perhaps it has something more to do with being shackled less by corporate interest and more serving what someone sees as in the "interest" of the universe? They can get more into the substance then might be allowed by the "professionals," i.e. the people that are hired by the companies and must subscribe to the legalities?
I can, of course, speak only for my own experiences. Ideally, I'd like to claim that my approach doesn't change significantly whether I'm writing for my own amusement or for an assignment, but I've been more willing to delve deeper with my assigment work, to think about things I wouldn't necessarily have considered by myself, and do things I might not otherwise have attempted, because I've had an external source of focus.
I don't ascribe any particular difference to the potential for quality - anyone writing RPGs professionally has their talents whether they're being paid to use them or not - but I wouldn't necessarily say that writing professionally has 'shackled' me in any way. Quite the contrary - the process of being assigned material means that I've had to look for inspiration, where fan material seldom is seldom so driven, as it draws more upon people doing what they want to do at the time and what they're comfortable doing. Simply put, professional work has challenged me more, because with fan material there is no inherent incentive to push myself.
Again, this is per my own experiences, and in no way represents anything but my own feelings and opinions on the matter.
Nathan 'N0-1_H3r3' Dowdell
Writing Credits so far: Into the Storm, Edge of the Abyss, Battlefleet Koronus, Black Crusade Core Rulebook, Hostile Acquisitions, First Founding, The Jericho Reach, The Soul Reaver, Only War Core Rulebook, The Navis Primer & Ark of Lost Souls
Disclaimer: Any & all comments I make on these forums are my own opinion, not those of Fantasy Flight Games. My comments & rules suggestions should not be taken as official, are for all intents & purposes nothing more than the words of a devoted fan & long-time member of this community.
A collection of my unofficial supplements can be found here.