^ why I downvoted you.
> how can you bring less than your whole self to work
This means basically wanting to be somewhere else rather than at work. i.e., their culture is one of being dedicated to work when you're at work; at least that's how I understand it.
> poor English
This is not uncommon colloquial English. “Team” and “family” here act roughly like “mind” does in the term “theory of mind”—basically nonspecific nouns.
> I don't care about my job…
Sounds like you are a poor fit for the culture they are trying to build. Presumably you would not enjoy working there. That does not make their concept of how to manage their company moronic, nor an explanation of it drivel, however.
Your comment is blazingly condescending toward a post that is clearly very well thought-out and considered, based solely on your disagreement with Buffer's approach to organizing their team and company. That seems wholly unnecessary, particularly since you present zero actual evidence of Buffer's approach being objectively worse, just your opinion that it is.