If you believe that adding higher risk people into an insurance pool doesn't raise average costs, that is a conspiracy theory. Showing insurance rates over time is not relevant here because there are a million different reasons why the market as a whole will get more or less expensive.
Uh, I do. Because it seems to be at least debated [1].
[1] https://econofact.org/factbrief/fact-check-have-healthcare-c...