Although I don't have any ideas about the which came first between the chicken and the egg, I do have some ideas about which is better...color or black-and-white when it comes to photography. In the olden days when I was a little boy, there was no choice. Black-and-White film was available. You took your pictures and then took the film to the local drug store. About a week or two later, you'd return to the drug store and pick up your rather small black-and-white prints. Once we started to use color film, we had a choice, color or black-and-white. However, if you started with color negatives, you'd probably have to print the black-and-white version yourself, or send it to a photo lab. If you started with black-and-white film, of course, you were stuck with black-and-whte prints. When we started to use digital cameras, we found that we didn't need to make the choice before we took the picture. We can take a color picture and easily convert it to black-and-white.
This flower grows in my bathroom, yes...the bathroom. It was taken with my iPhone. The black-and-white version was converted by the Best Camera app. I happen to like the color version. The best part is that *I* have the choice. iPhoneography gives us a wide range of choices that don't require a drug store, computer, or darkroom. I really like my iPhone as a camera. :)