A man convinced against his will is of the same opinion still. No reason or logic need apply, eh?
People as yourself do these people far more hurt and harm than any who oppose their behavior...for you enable them to continue their behavior and worse encourage them in it. Equally as destructive to them is your insistence that others change their opinions, and for each one you have convinced you have put yet another nail in their coffin.
Do you somehow think that you are the only individual privy to their plight? The truth is you are so far convinced you are loving them, by accepting their behavior, that you cannot see to help them escape what is not only possible to escape from but desirable. People as yourself stand in the way of the fulfilled life they were intended to have, as much as those you believe placed them in their position in the first place.