Buddy, you need to calm down and not go worrying about the sky falling at every tiny issue.
Firstly the situation is very murky with a lot of Indian active fake news being spammed, so it would be falling for their BS to go making broad clams about the CCP and PLA based on their lies. Of course they are going to pain China in the worst possible light, it’s their main reason for existing apparently.
Secondly, even if we just assume for the sake of argument that the reports of India making some land grabs is correct, that doesn’t really mean anything, and is actually entirely to be expected if you think about it logically and rationally.
Its a very long boarder, with no fixed boarder posts or observation posts for the most part. Patrols are having to be done on foot and only a tiny fraction of the boarder can be monitored at any given time. You are acting like this is the Korean DMZ where every square metre is monitored 24/7 when that is absolutely not the case.
India has more troops forward deployed than China, so its pretty much a given that if they want to, they can infiltrate and occupy positions before PLA patrols can know about it. They could also actively use their local numerical superiority to their advantage by pressing at multiple points within the same PLA garrison zone knowing that initial contacts would tie down what limited manpower the PLA has in the zone to allow other groups to advance unopposed. That is about as basic a military strategy as there is to take advantage of superior numbers.
Unless China wants to match Indian boarder troop numbers, which China doesn’t want to do, then that is always a risk.
These peacetime land grabs are pretty meaningless to start with, as sitting on a feature is meaningless if the enemy can take it from you any time they want.
The key difference is that the PLA can take any India held position pretty much any time they want if the chips are down, but the Indians don’t have that option, which is why they are super precious about trying to occupy positions during peacetime, when their superior numbers count and the PLA’s war fighting dominance doesn’t come into play.
So there is no point of any PLA presence going by your reasoning. The PLA can take whatever whenever but the measly PLA presence along certain parts means the Indians can and will do these things all the time with nothing really stopping them. If and when the PLA chooses to actually hit, then that would be a new development which we're waiting for. At the moment, PLA cannot stop Indian incursions along areas they are somehow not looking at despite satellite and drone surveillance being easy to do.
So in your version PLA simultaneously doesn't want to match their numbers but also wants to hold land and wants IA to respect this. LOL This isn't the case for sure. PLA is either using this to make moves or it's an oversight by PLA and CCP. This is all of course assuming some Indian incursions which the CCP has confirmed.