Only if they have a really good director.
In terms of manga, there's usually the head author and the assistants who do the grunt work in order to make the deadline.
In the manga that I linked prior, I'm working with two others: Shen, who I unofficially appointed as the editor who takes a look at the story, storyboard, rough sketch, script, and the inking to give the thumbs up to continue (since his name is attached to the project), and a girl named Kass who does all the shading and screen tone art. But the quality lies on me, the head artist and director of the project, as I'm making the sketches, rough drafts, story boards, scripting, and other miscellaneous tasks in order to get the quality that I want the comic to have. Although Kass does a great job at shading, it's moot if the line art is poorly done. And even if the art is good, the writing needs to be good otherwise the readers won't stay interested enough for the next issue, which is why I always have an editor of sorts to read over the script.
If you have novice artist work on a project, the end result will still be a novice project.
But, if you have a team of skilled artists working on something, seeing that they know what they're doing, then you'll output something at professional quality.