To be less controversial, the number of artists in ancient Greece was small. Today, depending upon definition, a huge portion of people make a living creatively. Heck, even a job like Food Photographer is an historical outlier in terms of the skill set.
As more types of jobs open up, and society has much, much better individual food security, people make decisions to enter more and more niche professions that don't always make for great statistics.
That's part of the modern, western problem, that when people are free to do what they want, and what we individually want is complicated, they tend to choose paths that lead to an aggregate we didn't expect. I mean, honestly, how many people ever predicted Instagram models in the 1980s? Youtube stars are analogous to TV stars, but Instagram? You take a photo of yourself next to something? That's your job?