Insurance of all types needs regulating. It's out of control! It's becoming a big rip off!
Insurance is heavily regulated. All 50 states have an insurance department and commissioner. Insurance companies aren't allowed to adjust their rates without approval from the state insurance commission. Mississippi is one of 11 states where the insurance commissioner is an elected position (which is dumb imo).
When these commissioners don't allow adequate rate increases, insurers just stop doing business in that state. Florida and California have lost tons of insurers. That just decreases competition and thus raises rates even more (supply vs demand).
Rates are skyrocketing because of claim costs. Claim costs are skyrocketing because vehicles & homes are much more expensive than they used to be. The widespread disasters (hurricanes, wildfires) seem to be happening more frequently and in the most populated areas. Florida has added ~8 million residents since 2000. That's a lot more exposure for insurers.
Insurance companies also buy insurance. It's called reinsurance. While you might not live in a state with big widespread disasters, when they happen the reinsurance policies payout to the insurers and the reinsurers lose billions. When that happens, the reinsurers raise there rates across the board to recoup loses. So hurricanes in Florida and wildfires in Hawaii or California ultimately drive up costs for everyone.