You don’t need to have almost anything in life. However, most people get pissed off or feel depressed when they can’t follow old habits - this is typically known as a standard of living reduction.
I think the goal of this post is to kick people out of a rut and make them reexamine their habits. If it's a habit and you like it and you're keeping it because you like it, great. But if there's something you're keeping because you think it's needed, check if maybe it isn't.
I don't think that's really what the author is talking about. He's talking about habits that people think they need to do to survive or be successful, but may not provide much value after all, and might actually be bad or harmful in some ways that someone might become blinded to.