Depends on the type of insurance you're talking about. In any case, if risks decrease and therefore insurance costs decrease, besides pushing for higher margin

Depends on the type of insurance you're talking about. In any case, if risks decrease and therefore insurance costs decrease, besides pushing for higher margins, insurance companies could also push for having more comprehensive plans that cost more than the basic ones. People who only opt for the basic plans now might shell out for the more comprehensive one if the prices overall drop, and so the more comprehensive ones would allow the insurance companies to retain their margins.