The act of eating is a service.

[Monica]

Normally, at the point of guilt, the choice has already been made. With understanding, you may decide to make another choice the next time you encounter the catalyst. That is probably the choice you speak of?

Yes, I'm referring to the 2nd choice - the choice to do something different next time. If guilt is ignored, then the person might never get to the point of making that different choice; thus, the catalyst was wasted.

The purpose of guilt, if utilized, is to bring to one's attention that they may wish to make a different choice next time.