Maybe they are in favour of it CSAM scanning as its suitable for "idle" law enforcement?
In the UK, there have been plenty of child grooming / abuse scenarios on a massive scale e.g. Rotherham, Telford as just a couple hat have recently been in the news.
A common theme of both those 2 was concerns being raised to the authorities, but ignored.
Would digital CSAM scanning have stopped those abuses? Who knows, but they could have been stopped far earlier with normal policing but they were not.
Hint to UK police, a sexually abused young girl is a victim & you should make some serious efforts to investigate her complaints, not just brand her a "child prostitute" to be ignored.
But look at the low prosecution rates & low conviction rates for men accused of rape / sexual assault / murder (**** off with sudden mania of rough sex murder defences) against adult women. Abuse of females of whatever age seems a crime that you have a good chance of getting away with.
The UK seems to do a lot of anti sex crime talk, but reality of the situation paints a different picture.
Disclosure - not a woman, however some close female friends of mine have been badly failed by the UK criminal justice system in rape / sexual assault cases (including one who was, as a child, sexually abused by her father) so my views not as objective as I would like them to be on this topic knowing what they went through.