It does seem so doesn't it. Are they not achingly aware of how these groups operate? Wouldn't they have had intell that there would be all sorts turning up?
They are not magic though. I have a friend who worked alongside the police regarding antisocial behaviour in London fairly recently.
He was shocked by how badly resourced they were, they really have been stripped down to the bone to the extent that they just could not provide anywhere near the same service that they could 5 years previously.
Another major problem is that mental health services have also been stripped to the bone.
Precious public money has been squandered on dodgy mindfulness and yoga charities, wellness consultants, image consultants, PR companies, leadership and corprorate training coaches, transformational change coaches and Independent NHS Providers.
As a result the police are left dealing with extremely mentally unwell and otherwise vulnerable people who really should be the responsibility of social services and mental health services.
Then covid hit and things got even worse.
I think the police are between a rock and a hard place. Whatever they do people will criticise them, but it has to be one of the most difficult, challenging and thankless jobs right now, working as a cop in a pandemic.