Comment by EthanHeilman

Not stupid, it is just hard to not get caught. Once you see how someone is caught you can say "oh of course I'd never do that", but you'd probably make some other mistake.

Could she and should she have taken better precautions, without a doubt. Would the average intelligence analyst who is not being coached by a foreign power do a better job, I doubt it. In fact many foreign spies have done a far worst job and not been caught immediately. This is because the intelligence they stole was not published. Being a source of a journalist is much harder than being a source for a foreign power.