Because it's just bad advice. They can hit your LLC with a lawsuit as well, they can make it so your LLC way of making money dies because they have you tied in court, and you might not even be considered as discreet entity (and thus protected) from the LLC (depending on jurisdiction). Not to mention the associated costs and extra effort (and all that for what? Preparation for any future personal lawsuit?)

> Genuinely not sure why people are downvoting you

Because he is condescending and because having to create an LLC to protect your house from legal harassment is the sign that the US legal system is completely broken, not the sign that people don't know how to manage them-selves.