I guess that means if you've driven drunk and killed someone in an accident while drunk, you would have "no right to ram your dubious morals down anyone's throat" by trying advise someone else not to drive while drunk.
Interesting fact, there is enough food in the world today so that everyone can get 3 square meals and be healthy. There is no need for replicators, simply a redistribution / sharing of resources.
Would you say an ex-alcoholic can't tell a current alcoholic not to drink? An ex-drug user can't tell a current drug user that they should avoid drugs?