One of the arguments I frequently hear about why the "fine arts" are dead/dying is because of the poor taste of the American people.
Things would be so much better if we were not all caught up in watching tripe like "Keeping up with the Kardashians."
Then someone points out that season premiere of this year's "Keeping up with the K's" had about 3.2 million viewers. That's about 1% of the U.S. population
Which means that if you put 100 people in a room, only 1 actually watched the show. To me that's a reminder of how difficult it is for anything, or anybody, to capture the sort of critical mass that existed years ago.
The truth is that everything is small scale now, even big media. There really isn't a mainstream anymore. There isn't one particular thing that "everybody" does.
The barrier between people and your art isn't one thing, it's everything.
The critical question is not how many people are doing other things. The critical question is whether you have the patience/skill/luck necessary to build a tribe of people who are interested in what you are doing.
If that tribe is big enough to sustain you then that's all you need.