It's a fun, upbeat article, but as an actual case, I think it falls down here:

> Our abundance of weirdos creates diversity not only in supply, but also in demand.

That's certainly true (imo), but the author seems to implicitly expect the supply and demand to match up and I'm pretty thoroughly convinced that they do not.

Thinking narrowly about jobs, there are a lot more people that want to be artists than people that want to buy art, causing art to be a pretty hard industry to make a living in. This is equally true of any other niche where there are X people wanting it and Y people providing it: there's no reason to expect those to be equal and, as it turns out, they rarely are.