No, Insurance companies are businesses, and sportbikes don't make them money.
They make money by collecting premiums, and paying out less then they collect. Sportbikes are fragile, and the claim costs are high. They are crashed frequently, and a lot of them are crashed early in the policy where they haven't collected a lot of premiums yet.
The point is, we are a BAD investment for them. Don't be surprised that they charge us rediculous prices.