Offer your thoughts or opinion on the input financial query or topic using your financial background.

Why would a person not want to purchase a Personal Liability (Umbrella) insurance policy?
You only need umbrella policy for large amounts of liability protection (I think they usually start with $1M). So if you don't have and don't expect to have assets at such a high value - why would you need the insurance? Your homeowners/renters/car/travel insurance should be enough, and you still need to have those for umbrella since its on top of the existing coverage, not instead. Many people just don't have enough assets to justify such a high coverage.