Sorry, I've just noticed that I messed up the sentence but I guess you get the point. All I'm trying to say is that society and human nature is always on view in Kant. So the "vital" is kept as an admonition. They represent a world view.

I think you miss a point in Kant's ethics. Snitching in that position is seen to not be considerable by majority of people. Kant acknowledges that and insists we shouldn't be proud of not snitching and accept that we lied. Basically we should stay humble and know that the ideas are definitely not less important than the actions.