Haha like you can't shoot professionally with something 1/6th of the price.
3K is like half a years worth of rent for a lot of people.. Perhaps my mindset is more frugal than you guys, but 3K+ for a single DSLR body is nuts when you consider how much you need to spend on top of that to make it really worth it.
Yeah, if you're an ACTUAL pro and it's your full time job, sure why not. That said, most people I know who have them are hobbyists or wannabies with a lot of expendable income.