When you CHOOSE to engage in the activity/behavior you choose the consequences. VERY Fair. When consequences choose you how is THAT fair?

You choose to smoke. You get cancer from doing so. You knew it might happen and you did it anyway.
You get Alzheimers, become senile, suffer from dementia. Who chooses that?  VERY unfair.

I know. No one said life is fair. But some things are unfairer than others. Don'tcha think?