The point is that what other people not willing to do, or being afraid to do, can be difficult for them, even if irrational. I personally can't think of easier

The point is that what other people not willing to do, or being afraid to do, can be difficult for them, even if irrational. I personally can't think of easier thing than losing weight when you know you will die younger and know the present life has worse quality of life as well. Of course the obesity problem has their own anti vaxxer movement where people claim obesity and health problems are not related, that it's beautiful etc.