Do you really need a STR insurance?

[Joel Oh]

Hi guys, 

I know I will get a lot of hates from this but does STRs insurance really good as their price?

From my experience so far, Airbnb never failed to cover any issues I had caused by guests. 

Also in case of fire or flood, I know a regular homeowner's insurance will have no problem covering it.

I have been wondering, if the local regulation doesn't require it, why do we need pay thousands of extra for STRs? 

Also I am having more and more difficulty finding insurance companies service STRs.

My agent recommended a visitor covering option to my regular insurance. Any thoughts on this?