This is untrue. Every time I have had issues with insurance companies my broker bent over backwards to help me out.
In the 90's I was in a roll over accident caused by road damage caused by a tornado. The insurance company was going to hold me responsible but after my broker got through with them I wasn't blamed for the accident, I got a few $K more than I paid for my vehicle (they wrote it off) and I was treated like gold.
If you have a broker that won't go to bat for you, change brokers 'cause yours sucks!!