It is true that all military parades are - at some extent - performative. Some may even argue that having a great performance is the whole idea for something like this.
You are going to see all arguments - most of them uninformed, biased or about the actual state of PLA assets, capabilities etc. At the end of the day though the whole idea of having a strong military for a country like China is to...not ever get forced to use it. That is what deterrence means.
Public posturing by states, experts or idiots on the internet is completely worthless. Same goes for posturing by China fanboys too btw and we have quite a lot of that in this forum, as expected of course. But at the end of the day, it is a fact that those that
have to know,
will get the message.
Some have even started to complain about it too, too much work 'n' all...case in point..
What I'm trying to say is that instead of getting offended by every idiot on the internet, relax, and enjoy the coming celebration.