I understand what you're trying to say, but it makes two problematic assumptions:
1. That vaccines are 100% effective.
2. That vaccines are only about the person who takes them.
On #1, this is easy: the best COVID vaccines currently available are around 95% effective. Some are less. That leaves a meaningful chance that despite the vaccination I might still get sick.
This provides a nice segue to #2: As the percentage of vaccinated individuals increases, the chances that I'll get sick due to that remaining 5% decreases.
This is a core tenet of herd immunity: folks who are not protected by the vaccine (or cannot be due to health issues) are still protected by the fact that everyone around them is protected. This doesn't mean it's safe to not be vaccinated - one need only look at measles outbreaks to validate this - but the point of getting the vaccine is about more than just the individual, it's about the population as a whole.
1. That vaccines are 100% effective.
2. That vaccines are only about the person who takes them.
On #1, this is easy: the best COVID vaccines currently available are around 95% effective. Some are less. That leaves a meaningful chance that despite the vaccination I might still get sick.
This provides a nice segue to #2: As the percentage of vaccinated individuals increases, the chances that I'll get sick due to that remaining 5% decreases.
This is a core tenet of herd immunity: folks who are not protected by the vaccine (or cannot be due to health issues) are still protected by the fact that everyone around them is protected. This doesn't mean it's safe to not be vaccinated - one need only look at measles outbreaks to validate this - but the point of getting the vaccine is about more than just the individual, it's about the population as a whole.