In order:
Person A is vaccinated - your point is mute - because you say the vaccine works.
That is on Person B, they are taking the risk. Hospitals use resources for all types of things, and dumb decisions of people. Should a hospital turn away all drug/drinking cases on a weekend night? I mean.. they're taking up resources that person A may require right?
To claim vaccinated vs. unvaccinated is more prone for a mutated virus - I believe hasn't been proven? But historically, you know why viruses mutate? Because we develop vaccines and they mutate to adjust for them. So link some data if you're going to make that claim.
All people squander all types of medical resources for all types of shit... please see my earlier post regarding medical issues people have based upon personal choices... which you tried to brush aside.
Person B is sick of Person A arguing that they should take orders about their personal health from strangers or government administrators. You don't know what an individuals situation is... and claiming you know what's best for them is bullshit.
Person A is fine. Person B is fine. Jackasses like you? Not so much.
I'll say one last time... Listen to your personal physicians and do what is best for your health. Be respectful and cognizant of your surroundings. And otherwise tell people like the above to fuck off.