About 10 years ago everyone got super sensitive with regards to airline security. So you problem couldn't just let a bunch of craigslist temps come in and apply some patches working on the live system.
I think the guys over at US could work a bit faster, but I will grant them they aren't exactly in an unregulated industry where they can "challenge the status quo". When kalanick bears down on the red tape, people aren't reminded that taxis were the attack vector of America's biggest security event.
But yeah, out-source it to one of the hundred or so DoD contractors or security professionals allowed to work on something like this, it likely wasn't that big of a job to patch that vuln.