I would assume if you don't want to do a particular job and don't have the skills for it, you're going to be really shitty at it.
That said, comic and illustrator jobs really don't pay well. You'd have to be super amazing at it to make any big bucks. Even guys at Marvel or DC don't earn all that much unless they're Jim Lee or someone of a similar position.
The first question is whether the job you want is permanent or freelance. Freelance generally has more risks and less pay until you have a decent reputation.