If you are at a higher level of vulnerability to post-infection consequences then it is your responsibility to minimise your risk of infection to yourself and others, if you are able to.
If you are of lower risk of infection you are responsible for not carelessly infecting yourself and others.
There is enough easily accessible guidance published to render the 'not me' attitude personally and socially irresponsible, if not selfish.
"Attention, attention, now hear this" as in wartime. Carelessness costs lives even if not yours.