The conspiracy theory would be proved if the chips were found. Therefore, the chips must necessarily be impossible to detect. The assumption is that the conspirators are so vastly sophisticated that they’re able to hide their actions perfectly; the conspiracy theorists can therefore posit themselves to be superior to non-believers, because, “I’m too smart to be taken in!” The looming problem here is that it’s possible to prove the chips are in the vaccine — and a null result means the theorists’ claim to superiority is hollow.
The conspiracy theory would be proved if the vaccine was analyzed and the chips were found. If there are chips in the vaccine then some agent must have put them there. If the theory is proved then everyone who cares to find out suddenly knows that the GWF exists. Few people would be happy about it — no matter what the GWF intends, it has been done without consent. Getting caught complicates things for the GWF; thus, we expect the GWF does not want the chips to be detected.
Suppose the chips were detected. The public would know that some GWF existed, even if they didn’t know who the GWF was. They will be highly motivated to find out. Suspicious eyes will be everywhere. Eventually, the GWF would be found out, and once the GWF is identified, the GWF instantly becomes a James Bond movie villain — except the GWF would be a real-life James Bond movie villain. There would be no place safe for the GWF to hide. Thus, the GWF needs to keep the chips secret, completely secret. If they can’t keep the secret, they’re asking for a real wrath of God hate-storm.