I don't know that's entirely fair... You can grow as a photographer and you can fit more on your plate as time goes...
Asking a person WHY they bought a camera is fair.
I'll answer this question with a timeline. Back in 2004 my first child was born and like most parents we wanted to capture every moment of our daughter's life. Fast forward a few years, my wife and I were looking at the pictures we had taken with our Nikon 885 p/s camera and noticed that our pictures looked just as crappy as our parents picture books did. Though we did 'capture' family memories, we wanted them to look better and figured it was the camera and not technique (noob mistake). In 2009 I bought a rebel T1i and started with the kit lens and a 70-300 IS USM. I stuck with that for a few more years. 2011 - both kids start to participate in sports, so now I can't get where I need to be for a good picture being on the sidelines. Start really using the 70-300 but find that after 200mm the lens was too soft. I found this website/forum and started to learn as quickly as my brain could absorb. I lurked here for a year before really starting to participate in the forum. My techniques improved dramatically and I made smarter lens choices. I got lenses that complimented my camera: 10-22, 17-55, 60 macro, 70-200 Mk II L IS USM, 85 1.8, 50 1.8, a couple of flashes, a much improved tripod, and last a 1.4 mk III teleconverter. I focused on technique and glass rather than updating a body. During the last couple of years I explored macro photography, portraits mainly for family pictures, and nature/wildlife photography. As my kids got quicker in sports, I grew my skills there by asking our local high school coach if I could take pictures during games from the sidelines. He liked what he saw and gave me a season sideline pass so I could practice in return for the pictures. I also take pictures for my daughter's diving team and son's baseball team. Now, my kids have joined the 4-H club and I'm providing "event" photography for them - again, to build my skills. I have a few realtor friends who've asked me to photograph their new listings for them. They've called me back for more work, so I must be doing okay there. And now, I'm not sure what else to do/try. So far all of my pictures have been functional rather than creative. That is the reason behind this question. I want to break out of the functional mode of photography. I want to jump start my brain to see the world in a different way and capture that world I live in. That is why I have asked the question. I am not a professional and have no plans to be, but don't judge me because I don't focus on one aspect of photography or you believe that I'm upset at how much money I've spent.
So why did I buy the camera? - to make sure my family memories don't look like crap.
edit - I still don't see why the equipment I have makes a difference to my question, nor if am I a photography professional or not. But, if you feel it's pertinent to your analysis and recommendations, then you have your answer above.