I also believe that homosexuality is often seen as a more egregious sin because it is one in which the participants and supporters of it collectively seem to have no remorse, shame, or intention of admitting the sinfulness of it. I have yet to see an ‘Alcoholics Pride Parade’, or an ‘Adulterers United Convention’, or a ‘Larceny Association’...you get my drift? Yet ‘Gay Pride Parades’ are not only accepted but celebrated. If you've ever witnessed one, the degradation is visibly apparent.
I don’t disagree with your point. However, I suggest that the idea of shame-free premarital heterosex has become so universally accepted there is no need to promote it.
If you believe it’s wrong, you’re the weirdo in today’s world.