All of the above applies, of course. The main reason why selling vol is different from providing insurance is the lack of barriers to entry. It's very hard to open an insurance company but it's pretty easy to open a TastyTrade account.
For all practical purposes, I think all these points (BigShort's included) are moot. Many parallels exist between option contracts and insurance contracts and I don't think there's any problem using familiarity with insurance to better understand options.
This is also not to say you can't go bust doing either one. One of the bigger objections I have is when I hear people calling it an ATM machine.

I am a difficult person to deal with