If a journalist sends a submission I'm more likely to read it faster, but not necessarily give it more weight. I'll read it faster not because I think the journalist is going to be a better writer than someone who isn't a journalist, but because journalists usually make good authors and clients - they're deadline driven and used to being edited, and they tend to be more practical about the sales/marketing/publicity side of things. So I like journalists. But if a journalist's submission isn't any good, I won't give her or him the benefit of the doubt just because he or she writes for a living. The submission stands or falls on the basis of the writing that's in it, not what the writer does for a living.
Of course, there are some professions and occupations that intrigue me more than others. I'll leave you to imagine what they may be.