It really depends...While the camera is important but having a certain camera does not make you a better photographer. It's your skills, knowledge of handling your camera, and creativity that makes you a better photographer! You could have the most expensive camera possible but still produce poor quality images.
What really matters is your knowledge and the type glass you shoot with!
Do people even read the thread? You would think by the third page people would know the OP is asking about subject matter and not equipment.
Anyways, I think the reason you see so many wedding photographers on forums is that it's probably one of the easiest best paying avenues to get into. You have legit pros that can easily make at least $1,500 on on wedding with the ability to make much more than that. Then you have the noobs with cameras that don't know what they're doing, but they want to start making money anyways and charge next to nothing an deliver a CD of 1000 craptastic photos for $200-$500.
Weddings can be nightmares and good wedding photographers know this and know how to control it. They're prepared and they know what to shoot, when to shoot, and how to shoot it. I hate weddings.
It's also harder to get into other avenues like journalism, editorial, commercial, etc... Not just anyone can spend $400 on a used DSLR and a lens and get a job at a local paper or shooting for businesses and such. There's usually already established photographers in these markets that means you're fighting with other shooters who have more experience and who have been doing the job you want to take for longer. They're not necessarily better photographers, but why should some one get rid of their current photog for you? Sometimes when you show them images that are clearly superior, they'll still favor their regular shooters. With jobs like these you need a strong portfolio and good marketing skills; you're dealing with other professionals and not people working on a shoe string budget. Wait, I need to rephrase that, you're working with professionals that are use to a quality product or service and not a young couple that doesn't see the value in photography until it's too late. ****, wrong again. You're working with people that want to best quality for as little as possible and that knows what quality looks like vs. people who don't have a lot of experience with professional photographers.
Did I get it right that time?