Let me qualify that for you ... as a society ... if you want to have health insurance available for everyone, and not exclude for pre-existing conditions and not price sky-high for these same conditions and not have a huge segment of the population permanently left out — you can’t get something for nothing. The insurance companies know how to price their product for including “everyone” in policies - even the “bad risks”.
Preexisting conditions are by and large what people traditionally insured themselves for, such that if they came down with such they would be covered in the future. Obamacare proponents propagated that against state insurance laws insurance companies merely dumped from coverage anyone who became sick.