That's true that in writing books, much more is left to the imagination of the reader. But I would also see it that classical authors and authors of comic books are different kinds of artists. Because the requirements are different. Whereas I'm sure that's kind of true for all authors.

And while an editor is indispensable when publishing a novel, that might play a smaller role when publishing comic books, because there's less text and a lot more pictures? In any case, you should make sure that you find a publisher who is also familiar with this genre.