I'm not being rediculous, what I'm suggesting is the integration is not likely as great as the level you think it is at. Also there is no input validation on some of those systems/fields. Anyone who has ever bought a gun in mass knows this if they unknowingly had an unactivated LTC and they plopped it on the counter. You will pass your fed BG check and then you cant get the gun (unless its a frame, which requires no EFA10) because of the EFA10 system not taking your license. By definition those licenses should return a failure against a query if NICS was actually doing it. It's quite obviously not, its simply being logged as part of the NICS query, probably because NICS has no way of actually checking it.
ETA: My point is, some of those fields you could literally type gibberish in and the system is literally only going to deny you if it matches something bad, it's not going to validate the data for being legit. I dont know why this is so hard for people to understand.
Are people exploiting it? Probably not... because of what I alluded to earlier (its easier for a badguy to get a crackhead or a whore to eat a felony for them) but NICS itself is looser than a truck stop whore, to put it mildly. Believing otherwise is silly.