> Insurance companies would be happy to not be squeezed, if some sort of regulation was made to prevent squeezing it would be nice.

Insurance companies are bound by ACA profit caps where 80% of revenue has to go to “medical claims”. This leads to a perverse situation where their theoretical maximum profit is tied to higher cost of services. If they’re at that limit and actually negotiated lower prices, they’d be in violation of those (perverted) profit caps.