Slate has an interesting story about photographer David Hobby - bringing hobby photography up to professional standards.
By teaching a horde of novices the skills necessary to shoot photographs of a quality that was until very recently only within the grasp of an elite few, Hobby has played a significant role in the transformation of the profession. In the last few years, the market rate for many types of professional photographs has dropped by as much as 99 percent.
I learned photography on the fly, when I worked as a reporter in South Carolina - back in the days of film and chemicals.
Technology changes, and many people benefit. But those who had the past monopolies suffer.