It's rubbish because it assumes vaccines work 100%, and there is no penalty as a society when someone gets sick.
Vaccines have benefits at an individual and at a population level.
At an individual level:
- They provide 90+% protection against severe disease and death
At a population level
- If enough people are vaccinated they reduce the probability of infection across the whole population. This means less infection overall, and less likelihood of new variants which might be more transmissible or vaccine resistant.
- Vaccines are not equally good for everyone. Many people are immune deficient for one reason or another (disease, or even just getting old) so rely on other people getting vaccinated so they are less likely to be infected. Many of these people have been living almost as hermits for 20 months now, they know if they catch this disease they are likely to die.
If too many people do not get vaccinated:
- More people get infected, which means new variants which might evade the vaccination are more likely.
- More people get seriously ill, which puts more strain on the health care workers. In NSW government predictions are that the health care system will be overwhelmed in October.
- COVID patients in ICU take places needed for other people. Heart attacks, strokes, accidents, cancer - all need ICU places that will be occupied by COVID patients. I know a guy who ended up in ICU last year and almost died after a dental procedure. If the places were occupied by COVID patients maybe he would be dead.
So you can claim that not being vaccinated only affects yourself, but that is rubbish.