The FAA works on an honor system. If they chased people around looking for violations and fining people (which apparently they used to do) then people would try to circumvent detection, or avoid declaring an emergency and end up creating a bigger one.
They need transparency for things to improve, so they expect you to self report and they bring the hammer down if you don’t by hitting you where it hurts: right in the flight certifications.
From what I’m seeing it looks like Virgin didn’t self report before the news folks got wind and the FAA heard it through the grapevine, so they’ll get a big fat wake up call, and if that doesn’t get their attention then things will get much worse for them. Or, this is just SOP and an angle that sells ads and so it’s being hyped while nothing particularly egregious is happening from the FAA’s point of view.