Pandora, a massive onslaught is being waged against Catholicism by the forces of evil. I remember reading over 30 years ago in the UK Daily Telegraph, very establishment and no great fan of Catholicism, that the Catholic Church was the last bastion left standing against secularism. This was in response to Protestantism's capitulation to the Prince of This World.
As you point out, the battleground chosen by secularism is sexual morality and by a clever strategy aided by the media, they accuse the bishops of being focussed upon this when they are only responding to it: 'culture warrior' is a meaningless tag just as 'fascist' is when applied to anyone who is not a rabid socialist.
In the end all this would be unimportant except that so many souls will have been led to perdition on account of it, not just now but in the future when purely secular forces will all but destroy Christian morality. Sad to say, the worst of the forces of evil is the fifth column.