My point is that those that do work from home and do it successfully (at least in my experience) have a separate work area for work that is not considered "home

My point is that those that do work from home and do it successfully (at least in my experience) have a separate work area for work that is not considered "home" but considered work, this is a concious decision people make to deal with working from home and not being distracted. If someone has an office to go to but also works from home they will often not consider creating another workspace at home and that will result in their home life and work life "merging". For a startup having your home life and work life being one and the same is relatively normal (again in my experience at least) but with a "normal" job most people don't want that. They go to work, they come home, work is done. If the line between home and work is merged as much as the article proposes without people making sure to create a separate work environment at home they'll have problems.