Cause hatzolah volunteers are there to help their brethren in need of help to save lives. Once you start billing insurance you turn the entire life saving organization into a business and throw the chessed of helping your brothers away.
I.e. if your going to bill insurance then I will just use a EMT service that is a business of providing ambulance services and other emergency help etc… Versus hatzolah volunteers acting as chessed when in truth it’s all business and their billing insurance.
WE HELP OUR BRETHREN TO SAVE THEIR LIVES NOT TO MAKE MONEY