There are often daily situations where both citizens and police don't know really know what the law is.
Reform is proven to be really hard. But that's the tragedy.
For instance taxes shouldn't really be more complicated then filling in a simple automated form. Also for businesses. And it should really be the burden of the government taxing that it's all clear. But it's not and it's a mess and the burden is put on the people.
Generally, the fact of the matter is simply that law is highly complex and the way it evolves is almost always by creating new laws, not getting rid of old ones. That's unfortunate obviously, but just like you don't just rewrite the Linux kernel, you can't just reset the legal foundation.
And of course, laws are made mostly by lawyers. So they don't have much of an incentive to change things.
Likewise, taxes should be simple and understandable and doable. Don't undersell our importance as citizens; We should demand more because we deserve well!
I think they call this “representative democracy”.
In fact, it is so complex for the average IQ that even some judges can't do it right, even the basics.
The complexity is intentional - it's to make lawyers the maximum possible money while avoiding maximum accountability.
Teaching is even more important, and we use professional teachers. Building a house is also an important moment in our lives, and most people would do well to accept the advice of a professional architect.