Comment by techbio

If something is so obvious as to need no explanation, it just might be worth understanding what about it is causal. What can be done given the predisposition to obesity in a time of abundant necessities? It seems your conclusion is to let it go to the joint processes of sin and natural selection, which would tend to call into question your moral certainty.

EDIT: Another post today titled "Causal Information Affects Decisions" seems relevant here:

https://news.ycombinator.com/item?id=29509236