I have no idea what point you are trying to make.
That it’s not a clear concept that most people agree on. There is something of a consensus regarding the core of the idea (AR and AK), but the borders of it are not agreed upon and everyone places their borders differently.
California law that you linked says that some pistols are assault weapons, AWB says that different pistols are. I have seen people claim that all semi-auto pistols are assault weapons. I have seen people claim that no pistols are assault weapons because only rifles can be assault weapons…
Any legislation will provide definitions just like the old one did.
A law will define those borders, but then another law will define different borders and then a newspaper or a think tank will define even different borders or not define them at all.
Jurisprudence will work out the wibbly parts over time.
But the definitions used in the laws are in NO WAY as screwing and confusing as a lot of people are trying to make it sound.
It’s not laws that are unclear. Typically each law is reasonably clear on its own. The idea is unclear.
If you don’t live in the United States, then where you live probably does it a different way.
Where I live, there is no concept of an “assault weapon”. Neither in the law, nor in public consciousness. As far as I know, this concept exists only in English. I guess it stems from the fact that someone translated “Sturmgewehr” as “assault rifle” and “assault” means not only soldiers storming enemy position, but also attacking someone on the street. In other languages, there is no such coincidence, so the vague concept of a “weapon for attacking innocent people on the street” did not appear.
In general, I see that US gun debate is “should a person own this gun”. The idea of “assault weapons” seems to be a product of this mindset. But in many other countries, the debate (if there even is one) is “should this person own a gun”. For example, EU “federal” law allows people to even own machine guns if they provide a reason (like collecting guns) and do not pose danger. (Many EU countries have stricter local laws, so only some countries actually allow machine guns, but the point still stands.)