Healthcare and access to medicine are very important to economic growth. People are more likely to take risks and contribute to the economy when there is stability in the economy. This is the same with the stability of their own health. When healthcare is cheaper and easier to obtain people are more likely to take economic risks and invest because they don't have to worry about their own health or the health of their loved-ones.
Additionally lower healthcare costs creates a bit of a positive feedback loop because people are more likely to get treated for illness before it gets worse. The worse an illness is the cost will raise exponentially.
There are definite benefits to socialized healthcare even if the ACA cooperatives are not doing well as a business. With other methods it could be possible to more efficiently run the cooperatives and cut those costs as well.