In many ways I attribute the trend towards panopticon and surveillance state and a matter of laziness and unprofessionalism among police forces.'
A professional uses their knowledge to weigh the pros and cons of what they are doing for their client. It isn't just giving the customer what they ask for like some sort of service vending machine but actually listening to needs and desires and working to fulfill them for the client. This is a lot harder than simply doing what needs to be done to "get the job done."
Widespread surveillance and net tactics are easy to use to produce basic results of lowering crime but don't consider other aspects and duties of the job such as watching out for citizen's rights or privacy or in many cases, actually following the law.
Secrecy is used to much the same effect. You don't have to do the work of explaining if you just label it a secret.