Now there I agree with you! It didn’t seem fair that you could create a business structure, funnel a small amount of your own money through it and access healthcare. But that was a loophole that has now been closed. If you set up a business it has to have a certain turnover now.
I ws referring to the more common/normal way people outside formal employment access French healthcare which is by paying cotisations of 8% of their income above about 10,000€. Which is what we did.