Missymoo I don't think there is an issue about 'political correctness leading to moral blindness'. It's illegal, and schools have a safeguarding duty to report if they suspect it's going to take place.
The problem is not one of 'political correctness', it's one of pragmatism: it's hard to spot and stop until it's too late. It's also a problem of cost: presently we have no government that is seriously putting money into addressing this. That's not because of 'political correctness', or a desire not to offend. Quite the opposite. Just as there is very little money for social services generally, there is very little money for this because not enough people care and not enough value is placed upon these lives.
It's not 'political correctness', it's a cynical reflection of lack of concern for the societally powerless.
Stop with this 'political correctness' nonsense. Think about what you're saying.
Just in case you can't work out what you're saying, I'l spell it out for you: you're saying that the vast majority of people working in education, social services and health care (the people most likely to get a chance to raise safeguarding concerns) in the UK are what RTB terms 'fake liberals' (great term, by the way, RTB), who place some weird cultural and individualist ideology above safety concerns for children.
You are saying that they knowingly let this practice continue and collude, in the interests of 'political correctness'.
Ask yourself: is this likely?
No. It isn't.
It helps absolutely no-one to give this the window-dressing of 'political correctness'. It is not premissed in some sort of unwillingness to offend. It is premissed in a structural cynicism. Calling it 'political correctness' tarnishes progressive ideologies and let's people get away with doing nothing.