It is not the only state with a whole series of strange and confusing laws regarding tools with sharp edges.

Some of the states that are much better WRT to firearms are just as bad on edged tools as CA.

You just have to know what the rules are. Unfortunately, many states there are a whole host of local ordinances that are almost impossible to track down that you might well inadvertently violate.

In IL, it is a class A misdemeanor to have an axe or hatchet with you while camping in a state park. It is doubtful anyone has ever been charged with it, but it is still illegal.