There is no such thing as "not being covered because treatment is expensive"
There most certainly is. Look at what the UK's cancer fund is going through. It's not unusual for NICE to say "we're not paying for that". For people with generous insurance in the US it's much more typical for the insurance company to roll over and pay for the latest and greatest due to public pressure.
You are confusing treatment that is expensive with treatment that is not cost-effective. Also, the parent message was not talking about cancer but hepatitis C.
There most certainly is. Look at what the UK's cancer fund is going through. It's not unusual for NICE to say "we're not paying for that". For people with generous insurance in the US it's much more typical for the insurance company to roll over and pay for the latest and greatest due to public pressure.