LEOs being a certain type of people is a big part of the problem. Compare to corporate IT, who have huge surveillance powers within their companies, but virtually none of them use it beyond their actual job duties.
I suspect it's human nature, earlier today I was reading about how some hospital staff had been fired [in the UK] for looking up details of patients they shouldn't have been involved with.
They should have known better, but despite constant training people just seem unable to help themselves.
Hospital staff have a certain reputation too. I've even heard nursing career being described as the female counterpart of police career, in that both of them attract the exact same type of person for the exact same reason (having people's lives in their hands). Can't say from my own experience if it's true or not, but I heard it often enough that I'm not terribly surprised.