DarknessofHeavenandDreams
I don't consider it a cop-out, but others do. I consider it expensive and impossible to advertise, though.
Same here. If you want to self-publish, that's fine. However, if you expect to make a career of writing novels and you want to make enough to live on, going to an industry is better. It is possible to make a good amount of money from self-publishing, but be prepared to do a LOT more work. Whether or not you go to an agency to publish, you'll still have to do most of the advertising yourself, but as Darkness here said, it is a lot harder if you're self-published. Interviewers and book reviewers are often less likely to review a self-published novel, and a lot of big bookstores may not carry self-published works. I think it's a credibility issue, when you send to an agency and they accept, it shows that out of hundreds of books, yours was good enough to stand out and good enough for the folks in the agency to put a big investment in. Literally anyone can self-publish and there's no quality control, there's no reason for book reviewer Janet Smith at the Fantasy World magazine to think your book is so special.
But with that said, there is something to be said about someone who can be successful with self-publishing. It means you had the business savvy and the know-how to make your book successful without having the backing of a big publisher, which is a huge thing. But again, unless you know exactly what you're doing and are willing to pay for everything on your own, it's very difficult.