I did not downvote, but just wanted to mention that the first two do not require a traditional publisher. In fact none of them do, but especially not the first two.
It is true that there are real quality issues with a lot of self-published work because you don't _need_ an editor to publish your book. Heck, you don't even need to do a self-edit pass. Write it and hit publish! But it is increasingly an expectation that you have one, because quality expectations are extremely high, especially for competitive money-making genres.
I started out self-editing and now pay for three professional edits for each release: developmental, copy, and proofread. Professional editors are not exclusive to traditional publishing houses.
I never claimed that they "require a traditional publisher", in fact I explicitly point out that you can pay for these yourself (though I can't imagine putting together a good team of editors without having prior publishing experience).
My point was that, in response to the parent claiming there's nothing traditional publishers offer, these are things that traditional publishers do in fact offer an author. If you write for a traditional publisher you mostly have to just worry about writing, and, unfortunately, marketing these days.
It is true that there are real quality issues with a lot of self-published work because you don't _need_ an editor to publish your book. Heck, you don't even need to do a self-edit pass. Write it and hit publish! But it is increasingly an expectation that you have one, because quality expectations are extremely high, especially for competitive money-making genres.
I started out self-editing and now pay for three professional edits for each release: developmental, copy, and proofread. Professional editors are not exclusive to traditional publishing houses.