Oh, is that what China is "more" concerned about? It has never made such nebulous claims about what it was "more" concerned about before. It has however made very concrete claims about what this and that specific USN ship should and should not be doing in its EEZs, so I am not so convinced that your forest-through-the-trees generalization is in any way applicable to China's known and stated concerns about USN FONOPS and spying activities, or that therefore an occasional intrusion by China into US EEZ is somehow not or less hypocritical because it doesn't occur as often. There is no generalization to be spun here. Either you permit no spies in EEZs or you permit all of them. Anything else is inconsistency and hypocrisy.what iron man is getting at is that China has in the past made actions and announcements that suggest its position is that a nation with its EEZ should be able to deny military/spy ships from operating within it, and thus saying China is being a hypocrite.
Personally I've found the entire EEZ and military/spy ships matter to be a bit simplistic, because what China is more concerned about is the overall strategic positioning of military assets especially relative to population, economic and strategic military centres, the frequency/continuous presence of those assets relative to important centres, and the overall military balance.
The US (in this case at least) is not being the hypocrite. Back during the Cold War both Russia and the US would routinely send their spy ships to just outside the 12nm territorial seas of the other, and all that would result is one side sends a ship to shadow the other side's spy ship. When China sent a spy ship to RIMPAC 2014, the US did not protest its presence to China, only noted that it was there. China on the other hand routinely protests to the US when it makes FONOPS in the SCS or sends spy ships/planes. China really has only two options to avoid hypocrisy: stop protesting USN FONOPS and spy ops, or stop sending its own spy ships into US EEZs. Of course, being hypocritical is normal for great nations so it's not some kind of outlying behavior. OTOH normality does not negate hypocrisy, and it's not wrong to point it out when it happens.China didn't say she will refrain from doing so unilaterally while others are doing it.
US is pretty much saying freedom of their fists starts right at the end of China's nose-tip.
There is no point to unilaterally refrain from such behavior unless there is a mutual reciprocity, or a sort of multilateral agreement.