The reason car insurance is so cheap in Wisconsin is a bit of a mystery. While not a huge magnet for severe weather it does receive its fair share of snow in the winter and tornadoes in the summer. Flooding is not uncommon and rising rivers point to spring flooding this year. Flood damage is covered by comprehensive coverage, which is not required in most states, if you want your vehicle to be fully covered, you will need to carry this optional coverage.
I don't believe it is fair that insurance companies are allowed, by law, to check your credit report. I have worked my fingers to the bone to attain good credit. My credit score was excellent. After having a new HVAC system put in it went down to "good." My car insurance went up $139. It it very unfair to pay more for insurance because my debt increased. My finances should not be any business of the insurance companies. I always pay my bills on time and have never been late with a premium payment. So So UNFAIR!!
Auto insurance is financial protection, and not just for the investment you made when you bought your car. After a really serious accident, bills for damage and injuries can easily reach into hundreds of thousands of dollars. If you happen to cause such a wreck, the victims could sue you. In the worst case scenario, assets such as your savings and home could be seized.
Let's use the aftermath of Superstorm Sandy as an example to illustrate the differences between collision and comprehensive. Within that storm, let's consider two events that might have happened: 1) a heavy tree branch fell on your car, or 2) you swerved to avoid a falling tree branch and wound up crashing into a tree. In the first event, you had no control over when or why a tree branch would fall on your car. This kind of accident would get reimbursed under your comprehensive policy. In the second situation, you were driving the car and ultimately swerved into the tree, which makes it a collision, and collision insurance therefore pays for the damages. Events like the hypothetical ones stated above are why it's important to differentiate between the two types of coverage.
While there are a couple of benefits of collision insurance, the main one is that you can file a claim and receive reimbursement regardless of who was at fault. Collision claims usually get processed faster than property damage claims because the insurance company does not have to spend time investigating who was at-fault. Another benefit is that you only deal with your own insurance company, rather than another insurer with less incentive to pay for your claim. Collision insurance can also be used toward your rental car in most cases, which can spare you from having to buy rental car insurance.