These people are trying to control the discussion because they're know how full of shit they are.  They're junkies and they're going to use junkie logic to argue they're ok to do what they do. If they drank enough to get liver problems and tried to use fat-logic they would be called out for being junkies.  Food is somehow ok to have in excess and the need to dose yourself regularly until you feel good enough to quit is junkie logic.