I think what you're looking for is STANDARDISATION. Unless enforced by legislation, it ain't gonna happen, everyone's going to have their own ideas and local peculiarities.
You can do one of three things:
a) admire and embrace the diversity if operation at different aerodromes and of life's rich pattern.
b) rail against it
c) get legislation put in place to make everyone do the same thing.
Personally, I'm an a) person.
I think it would be an enormous shame if c) were to come to pass.
TOO
ps
Historically, I think the requirement to 'book out' at UK aerodromes arose from the disappearance on a flight of the son of a once-famous but now-forgotten comedian, Michael Bentine. I think he managed to be a c) person, but things have gradually flopped back to how they were before.