The risk is that if the state have no power to forcibly remove someone causing such a disturbance then those present may lose faith in institutions such as the

The risk is that if the state have no power to forcibly remove someone causing such a disturbance then those present may lose faith in institutions such as the police who they may not unreasonably see as being responsible for "keeping the peace" and worse, take matters into their own hands (in fact it very much looked like this was likely in one such case in Edinburgh). As long it's not considered criminal and the only "punishment" is being physically denied access to the scene in question I wouldn't be overly concerned about it being an overreach of the government. None of which is to say I accept the police did everything right in this particular occasion.