No one steps in to purchase failing businesses without a purpose and there was a definite purpose here -- one is to bypass the regulation in place since 911 that we have to have the passenger manifest before a foreign airline can land in the USA... this allows them to go around that, and doesn't help our security situation.
I should probably add that having a national airline is a matter of prestige, as well as a matter of national security. But the notion that foreign airlines are not subject to our security regulations now, or at some hypothetical time in the future is laughable on its face, and you should be ashamed for suggesting it.