Because it is super-risky to consider these things on their own merits if you are not the kind of person who regularly interacts with judges and juries. Laws are something that are applied within a particular kind of, ah, culture. You have to be familiar with the body of work of that culture and how they will likely interpret the law. Trying to interpret laws in ignorance of that culture is likely to lead to interpretations contrary to those with the power to enforce the laws, and land you in a lot of trouble.

In other words, laws aren't code or mathematics. They're not pure exercises of abstract thought to be considered in isolation. Trying to treat them that way is going to lead to trouble.