Via bulk purchasing, a store paid $10 for a widget that has an MSRP of $40. For the store to break-even, they need to sell it for at least $22. They sell it to you at $36 or, a 10% discount.
With insurance, there is no widget, and you get wildly different and even the same prices from one business to the next; one agent to the next. In their case, "Discount" is a marketing term. If you have no accessible or published MSRP to work off of, how do you know that you're actually getting a "discount"? How do you know that you're "saving money" when you can add-up the cash that you've paid in and come out wwwaaayyy beyond the average filed per claim for you area?
I just found out earlier this week that a coworker who is much younger, not married, has gone through several cars and addresses in a short period, has filed claims, talked about filing bankruptcy, has probably had more traffic tickets... longer story short... in every measure of the sense, you'd assume would be higher risk, is instead paying a fraction (~1/3) of what the same company wanted to charge me.