Wow, you should tone down the condescension when you are obviously ignorant about what it means to hold a security clearance.
When you apply for a clearance, you are committing under oath to protect the information that you are handling. You are committing to abide by all the laws and rules pertaining to classified data. You are swearing to report any unintentional viewing of data, any mishandling, any spillage. You get trained regularly in proper data handling, have to refresh your commitment regularly, and should be in a community where people are keenly aware of how to handle classified data or not. Especially at any of the 3-letter agencies. This woman intentionally accessed data outside of her job without a need to know and then intentionally shared that with an uncleared third party. That is espionage. It doesn't matter if the recipient is a foreign actor or the press. She swore under oath not to commit these actions and then commenced anyways. She is not a hero. She is a criminal.
As for oversight and whistleblower channels, there are a great many avenues to pursue if you think you have to report something. Taking it to a reporter, or Wikileaks, is almost the worst course of action. People who are going this route are looking for the glory. They may act all altruistic, but they are violating their vows, federal law, and stupidly endangering people around the world. They know that the media is going to laud their courage. Mark Felt was wrong to do what he did. Even Woodward and Bernstein described him as an incurable gossip. He also collaborated with them before the Watergate leaks, so it wasn't like that one event was the straw that broke the camel's back.
Classified data isn't classified to keep America from seeing it. Classified data is restricted to keep our enemies from seeing it, We elect representatives who have oversight on intel to protect our interests. Other elected officials appoint a wide range of people, from analysts to judges to oversee the intelligence system. These are our checks and balances. Not the media, who have no context to interpret the smidgen of data that they may get out of context and who are increasingly incentivized to sensationalism and strife rather than propriety and ethics.