To reassure people, especially the elderly and vulnerable, that their home is not going to be invaded by every Tom, Dick and Harry employed by the local authority. Police should be the only people who have a right of entry to a person's home without the owner's permission and then only with a search warrant.
I understand that local authorities now have powers to enter my home using many new laws as an excuse. (Unsure of the precise number, maybe over 50.) Bearing in mind those wielding such power can be over zealous, lacking in balance and common sense and just plain stupid the householder is vulnerable. Such laws need revisitng, the local authorities are in place to provide services, for which the taxpayer pays heavily, they are not in place to boss us around.