Pretty much all drivers are subject to the risks mentioned above, so the short answer to the question is, "Almost everybody." Take animal collisions, for example. According to the Insurance Institute for Highway Safety, there are more than 1.5 million deer-vehicle collisions every year, resulting in over $1 billion in vehicle damage — and that's just deer-vehicle collisions.
While State Farm's shopping experience is well-reviewed, customers did not feel as strongly about it's claims handling process. The company scored about the same as the other four large companies, but was still mediocre. A large national company may be expected to not be very efficient because of the various departments involved in handling individual claims. If you want the assurances guaranteed to you by a large, "legacy" carrier, then State Farm is the best to go with.
If you have paid off your car, comprehensive coverage is optional. It may be a good idea to find out the Kelley Blue Book value of your vehicle. Would you be able to pay that amount to repair or replace your vehicle if it were stolen or damaged in an accident? If you can't afford to pay much out of pocket, then buying optional coverages, like comprehensive coverage and collision coverage, may be a smart investment.