We already have discrimination in medical care its called 'triage', unfortunately it doesn't involved removing care once granted.

We also charge smokers more for health care due to the burden they put on the system, yet another form of discrimination.

You're also making the naive mistake of relating a stable system (smokers with health issues) with an unstable system (covid patients). These two types of systems have VERY different impacts on the medical infrastructure.

QED: no one is opening any flood gates. we've had this shit in place for over a century. we use to let you just die at home when you caught the plague.