Earlier quoted context omitted.
I think you framed your anecdotal evidence as supporting the OP's statement, but also that you misunderstood such statement; and you actually present evidence against it. If companies find it hard to reliably staff generalist positions, _and_ you're a generalist as you claim, then you would find it _easy_ to get a job.
I think the anecdote and OP’s statement support one another - companies have a hard time reliably staffing generalists and one of the reasons for that is that they are bad at identifying them and determining how to use them. Parent showed them a generalist skill set and they saw a lack of professionalism.
The hard part is giving in to a job. I think my hesitancy in this area straight up reeks to the point H.R. people/recruiters can pretty much smell it. It's just not about the money for me. If I was doing something I enjoyed and had time to work on creative projects (a.k.a. "my life's work"), I'd be fine on ~ $1000/mo (say at ~20-40 hrs/mo). But this presents difficult hiring/management challenges, the main one being the challenge of using my time effectively. When someone is always on call, management doesn't have to worry about this as much.
Honestly, I think companies could get a lot more bang for their buck if they put more money into hiring people to maintain and improve on open source projects that they use. And I know that there are jobs like this out there. I just need to keep looking for one that fits me :)