I’m not advocating for the retention of Medicare and Medicaid. I’m acknowledging they will exist with the repeal of Obamacare.
As for resetting for preexisting conditions per 2008, first it isn’t feasible. Second, even if it were feasible, a government mandate to force some insurer to accept is a de facto subsidy by those participating through the same insurer who do not have the conditions.
How is it a subsidy if, for example, the repeal of obamacare mandated that insurers accept back previous customers without restriction? But more importantly, why do you find that very small subsidy (if you think it is one) unacceptable, while there are other subsidies that are probably 100 times as big happening via Medicare and Medicaid? If you want to be an absolutist, be one and get the government out of healthcare entirely.