That's a horrifying, dystopian future I'd rather not be a part of.
Everybody should be entitled to health-care no matter what their life choices.
If you drive a motorcycle and get in an accident, you should expect the same level of healthcare as someone who drives a car and gets into an accident, despite the vastly different level of injury.
If the system you're living in allows you to buy and consume cigarettes, sugar, marijuana, and you need medical assistance for your diabetes, lung problems, cancer - I'd expect the same level of care as someone who'd abstained from these vices their whole life.
To limit medical care to people based on what they choose to do to their bodies is the exact same as limiting medical care to people based on what they can afford.
It's "Just pull yourself up by the bootstraps and work harder to afford your chemotherapy, you non-smoker!" vs. "Sorry you work 16-hour days to provide for your family so you have a stress outlet of stress-eating, smoking/vaping, etc. - but you made that choice, should have 'pulled yourself up by your bootstraps' and kicked the habit!"