Your argument would be on track only if he was asking for personal info (name, address, etc) of the registered owner. Checking to see if a vehicle is stolen is not personal gain, it's in the interest of the State and the actual registered owner if it is stolen. He is also asking in good faith to avoid the possibility of purchasing stolen property. I have to get re certified every year. I know what info I can and cannot give out.
I can understand that. Guess it's from a different perspective. The training we were given and had to abide by was not to divulge anything we did in NCIC to non-authorized persons.