I think “good judgment” is somewhat relative. She was in her early 20s at the time. I think it’s hard to grasp the reality of potential legal consequences and the full weight of the American government at that age.
I would argue many people don't fully process the consequences of their actions regardless of age. That's a separate issue we have to solve for.
In this instance (right or wrong) she was found guilty, she admitted to the action, and she did the time. Hopefully she's able to find gainful employment moving forward.