The jobs are definitely real and I was careful to not make any claims otherwise. I've worked in failed startups myself, so I certainly know.
As far as WeWork not being a real business, I think this was fairly well documented during the IPO attempt. However, more generally, when I say real business I mean a business that can survive without getting most of its funds from an unrelated source, i.e. investors. All evidence points towards WeWork not being able to continue without continued burning of investor money and there's no path to profitability on the horizon even.
Yikes. I have worked in two different startups that imploded quickly, largely due to an inability to find an effective sales and growth strategy. The fact that I was sold on the vision and that vision wasn't realized doesn't make the work I was doing any less challenging, nor did it make the job or business any less real.