U dont understand that:
" They used chi to hurt and kill Buu. Power Cosmic is magnitudes above chi. You and hitsu don't understand how much Surfer rapes these guys. "
Chi = Everything and anything / Inside everything and anything
Chi > Power Cosmic.
Can u use Power Cosmic when you are DEAD.
Chi is contained in everything in Spiritual and Physical Universe.
To kill Buu required Vast amounts of Positive Energy (Afterlife minus Hell, Planet New Namek, Planet Earth plus Z-Fighter, Full Powered Goku SSJ) more than Surfer can Output.