How would an entity run an investigation or audit against Google?
If I, or I'm assuming anyone who doesn't work in Google, was asked to come in and develop a fundamental understanding of how everything works within Google's software/infrastructure it would likely take me a long time to do that and I'd likely need a lot of help from real Googlers. They are, of course, the best of the best and I'm just some random SWE.
I'm assuming their business side is as complicated as their software must be and I'm assuming their legal/business/executive team is as smart as their engineers. How practical is it for an outside party to claim that they actually understand what is happening within Google? How many people does that take? How long does that take? Does Google need to provide support staff for these people to aid them in understanding Google's internal business structure?
Also, for audits like this is "understanding what is happening within $company" a factor? If a company is so big that it can't see what it's stepping on (crushing in an noncompetitive way) does it get a pass?