I've heard it said that common sense is just what naive people assume is obvious.
I'm not sure about that but I do know that people often disagree on what is and isn't common sense.
I guess this is why English Common Law works. We use precedence to argue about how the words of the law should be interpreted and at least try to flush out ambiguity.
It does not tell me not to moralize. It just tells me to not take any other rules into account that might exist, i.e. to not construct a legalistic argument.
But I don’t need to to allow ambulances. I think this is the core of what many engineers fundamentally don’t get about rules and laws in society?
The framing of the rules clearly places this rule firmly in the real world, in a real park.