As a brit who has had a gap year, and worked for it. I don't deny the existence of gap years, or people working on the road, by all means. But taking my past travels, for example, I now realise that I was fortunate to be at a particular point in my life (still living at home) and had parents which were not rich, but well enough off to be a viable backup should a problem arise. I also worked hard for it.
Gap years aside, I'm referring to sustainability when trying to do the work you want to, travelling and living frugally. Perhaps the author of the blog post was waiting tables for 8 years, in which case I apologise. But I'm assuming that, like me, they're a person who might have a bit of savings, and has a skill set in an industry that is location-independent. As such, doing work we are qualified in, on the road, is an option that is available to us. However, I acknowledge that doing so is a luxury. I do not believe I would be able to do so if I was penniless and didn't have a fair amount of work experience.
I didn't mean to be a killjoy. Doing what the author of the blog post did is something that I aspire to do. And as someone working hard towards that goal (work fulfillment + location and financial independence + guaranteed retirement income), I feel that presenting the bigger picture is important.