If they decide to not provide healthcare for people who choose not to take the jab, then they would (if it were a logical approach) also have to deny health care to drug addicts, obese people, smokers, alcoholics, people who are injured while participating in risky activities (such as sports, motor sports, or illegal acts), etc. Society has for a long time held that you cannot withhold treatment because of the prior actions of the patient, or whatever risks they have taken. A move in this direction is not a slippery slope, it's a fucking cliff.