[bruce511]

I'm not sure it conflates the niches with employment. Many of the examples given are specifically non-paying niches. (Starting with breakup-whisperer).

Indeed for some percentage of people, employment is not fulfilling or satisfying. They turn to other activities to create significance in their lives. (Open Source software is pretty much built on this concept.)

That said, I suspect the basic premise (everyone has a unique niche) is flawed. It's more likely that everyone has the opportunity to add value to society, and that value comes in various ever-creative forms. Many choose not to take that opportunity, and hypothetically we're worse off for that, but life pretty much still goes on.

[MichaelZuo]

It’s obviously false in the literal sense, since some number of people literally lack the capability to remain alive.

Not to mention the small fraction of adults that suffer serious brain damage and turn into vegetables.