Maybe because it takes so much energy to beat yourself up and feel guilty. Energy that could be used elsewhere, like moving forward. Absolutely nothing is accomplished by all that guilt ............ it's just emotion. My suggestion would be to try to concentrate on the issues you're working on and don't waste time & energy. I know, I know, easier said than done. But maybe if you make an effort in that direction it will help. Good luck! (I HATE feeling guilty ...geez, it's such a waste of time)