A look at the history of insurance in general and medical insurance recently in Massachusetts will disabuse you of the notion that the government can not force insurance companies out of business.
Throwing MA out there as 'proof' that the government can drive insurance companies out of business when the MA legislation has done no such thing, and even if it had driven companies out of business, the model and environment for the MA legislation is so different from the ACA legislation is hardly support for your argument.
If you want more specific points on how ACA is a net-win for the insurance companies, here: http://industry.bnet.com/healthcare/10002208/insurance-compa...