Knowledge ano not trusting most people you are working with are not really qualified professionals and you are vulnerable to their cheating because you typically do not have any control on the stock market or real estate deals unless you buy on the stock market with options that are designed to assist you. 

What you said is essentially what I was thinking- wanted to make sure I wasn't out in left field and leaving us vulnerable to getting shorted in the situation.

And in this part of the country you are vulnerable to frozen pipes by allowing too much air to circulated underneath. 

Trying to be passive but using active investing measures and models leaves you vulnerable.  

Unless they make the gears out something utterly unbreakable they're vulnerable.

Here is what NOT to do...get sucked into paying thousands of dollars to so called gurus that prey on vulnerable newbies.

It protects your personal assets from suits related to the "business," but if you are sued personally (say wrongful death related to a car accident) isn't your ownership of the LLC (or multiple LLCs) a vulnerable asset?

Much also has to do with the LLC capitalization, as it may stand alone based on its own holdings and the fact that most LLC's  are under capitalized, thereby leaving them vulnerable to challenges of really being a stand alone business other than a ploy of an individual operator.

Of course there's always the venerable (vulnerable?)

Single member LLC's in my opinion are just to vulnerable.