Having the vaccine isn’t just about protecting yourself, it’s about protecting the wider population as well as yourself.
What the chances are of a person with healthy lungs becoming severely ill or dying from Covid is neither here nor there compared to there being less virus around. The more people are vaccinated, the less of the virus is multiplying in respiratory cells therefore there is ever decreasing amounts of the virus being spread and the people who it will affect the most will be more protected.
Masks are mostly about protecting others, as masks reduce the amount of droplets being breathed out into the air so in confined spaces other people are breathing in less of the virus from infected people.
Washing hands is also mainly about protecting others, as you are touching door handles and other things that the wider population will also touch with less virus on your hands therefore less of the virus is spread. Always with the thought of the person at the end of the chain who are most vulnerable to the virus.
This collective effort has been about the collective since the virus came around. It’s not about me or you, it’s about those who it will affect the most (and that’s not just with illness, but also with peoples’ livelihoods because the more of the virus is around, the more it affects businesses).