I'm sure it's a mix of both. Yes, there's a ton of home insurance lawsuits here, and yes, the amount of fraud here is mind-boggling.
However, the rapid rise in sea level and the fact that the state legislature is bound by law to not discuss it at all is also a factor. South Florida's coasts will be uninhabitable within 50 years, and if I'm an insurer, that's also on my mind.