DY > Because there’s a bigger risk in not taking it.
One research I saw was that death rate in nursing homes was 50% higher in towns with colleges. Statistics collected over multiple areas in USA. Attributed to medical students bringing it in, despite all protection measures and testing. So, the fact is that anyone who can be a host to the virus can potentially lead to someone being sick.
So, if you are a person who would be happy to help an old lady cross the road (I presume everyone here would be), then you can as well do little things to help cure the world by taking a vaccine, travelling less, not going into large gathering, etc.