It may be something that future generations are more open to, but I am pretty confident that for the foreseeable future, using the argument of nondiscrimination, and "Let's get it right for the kids who are here right now," and giving them the best chance possible, is going to be a more persuasive argument.
The feeling for what ought and ought not to be grows and dies like a tree, and no fertilizer of any kind will do much good. What the individual can do is give a fine example, and have the courage to firmly uphold ethical convictions in a society of cynics. I have for a long time tried to conduct myself this way, with varying success.
Just as the soul fills the body, so God fills the world. Just as the soul bears the body, so God endures the world. Just as the soul sees but is not seen, so God sees but is not seen. Just as the soul feeds the body, so God gives food to the world.
Before giving, the mind of the giver is happy; while giving, the mind of the giver is made peaceful; and having given, the mind of the giver is uplifted.