I do appreciate some of this perspective, but I think there's also other elements you aren't considering.
Firstly, you're right - there are now a LOT more people filming this, and so denying the obvious would be just stupid.
Also, there have been good people who have tried to come forwards before, and not much has happened. But, the timing is better now (considering the above point about availability of data), and some of those from earlier times are stepping up a bit now. Grusch was, largely, just the most recent. In a way, he's the questionable, given this timing! But, I do hope that he does have the info he's been suggesting.
Lastly, although the government is certainly not on the side of the people, they are still people themselves, and having other parts of government kick them the same way that the people have been kicked is helpful to us. So, having that hearing is good in that it shows the good members of congress and senate (and one should presume there are at least a couple of good ones!) that, on one sense, they're not actually perceived as being part of the real 'government' of the country, but just a bunch of hicks who got elected by the ignorant masses. (somewhat reminiscent of 'Yes, (Prime) Minister')
So, it's not really that 'government' as most people think of that is going to slow down or halt (or manipulate) disclosure - it's the real ones (like the public services, 3 letter abbreviations, Pentagon, etc etc).
Why wasn't Greer's Disclosure Project involved in this?? Good question! Maybe because they're taking the legal route, and so can't be while doing so?