The National Security Law room is a superb place to bring someone capable of critical independent thought to study rhetoric and indoctrination IF that's what you think the intention of this room is. If have that opinion, you will also think that its a characteristic of some to try and reduce events or strip information from the relevant context, to present it in it's simplest terms, and portray it as an unquestionable fact.
In a society where censorship spreads its tentacles and freedoms slowly erode, there will be a point one day where people lose objectivity and the ability to critically think about what they are being told. Do you believe that is the path that society is on?
If all you want to do is to understand what this law is, more questions are raised than questions answered. If you've been to mainland China and visited a 'museum', and I use that term loosely, you might think that you are seeing a similar approach with questionable facts and critical omissions.
But nonetheless, never fail to try and understand what this law all about and whether it's been unfairly criticised. And if you think it is, ponder why? Or why not.