if you don’t have mandatory catastrophic insurance, the uninsured would still get care and that ends up increasing the cost for the whole system.
As for non-catastrophic, there is no real need for everyone to have this insurance.
If you aren’t carrying non-catastrophic insurance, and the dr’s visit costs $200 per pop, not including any lab work, prescriptions, every one will find a way to make their routine visits catastrophic.
Any time insurance is mandatory, someone will find a way to drive up costs, resulting in the payer lowest on the totem pole paying.